Zagg Limitless User manual

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
1
ZAGG
Limitless Universal
Bluetooth Keyboard
Revision History
R
evision Date Notes
R
eleased By
01 12/24/2014 Initial Release k.ha
r
wa
r
d
02 03/25/2015 Updated Requirements k.harward
03 04/01/2015 Updated Requirements k.Ha
r
wa
r
d
04 06/15/2015 Updated Requirements O. Ca
r
lson

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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TableofContents
1 General Specifications ......................................................................................... 4
2 Mechanical Specification..................................................................................... 5
2.1 Characteristics of Material .......................................................................... 5
2.2 Packed - Including Packing.............................................................................. 6
2.3 Detachability of Cable Pull Out........................................................................ 6
2.4 Key Board Specification............................................................................... 6
2.4.1 Life Test.......................................................................................................... 6
2.4.3 Keyboard Height..................................................................................... 7
2.4.4 Max Keycap Depressing Force .......................................................... 7
2.4.5 Keycap Strength..................................................................................... 7
2.4.6 Keycap Spacing And Alignment........................................................ 7
2.4.7 Key In Test Spec On The 4 Corners Of The Key Cap................... 8
2.5 Characteristics of Switches........................................................................ 9
2.5.1 Slide Switch............................................................................................. 9
2.5.2 Tact Switch.............................................................................................. 9
2.5.3 Sleep Magnet Function......................................................................... 9
2.6 Characteristics of Cradle............................................................................. 9
2.6.1 Cradle Dimensions................................................................................ 9
2.6.2 Cradle Material........................................................................................ 9
3 Electrical Specification....................................................................................... 10
3.1 Electrical Characteristics........................................................................... 10
1.1.1 Feature:.................................................................................................... 10
1.2 Power Rating................................................................................................. 10
1.3 LED Indicator behavior............................................................................... 11
3.2 RF Specifications......................................................................................... 13
3.3 Bluetooth Module Block Diagram............................................................ 14
3.4 Sleep mode.................................................................................................... 14
3.5 Keyboard layout........................................................................................... 14
3.6 Fn Combination Key Function Descriptions........................................ 15
3.7 Bluetooth 3.0 9 inch Keyboard Key Matrix for Apple......................... 17
3.8 Schematic Circuit......................................................................................... 18
3.9 Pseudo N-Key Rollover Capability.......................................................... 19
3.10 Free From Illegal Ghost key...................................................................... 19
3.11 Compatibility................................................................................................. 19
3.12 Battery Specification................................................................................... 19

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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3.14.1 Charging Specification........................................................................... 19
3.14.2 Battery Capacity....................................................................................... 19
3.14.3 Short time charging of Battery............................................................. 19
3.14.4 Charging Profile of Battery.................................................................... 19
3.14.5 Standby and Active time of Battery.................................................... 19
3.14.6 Under Voltage and Over Voltage Protection in Battery................. 20
3.15 Keyboard Module......................................................................................... 20
3.16 Key Functional Test..................................................................................... 20
Refer to Key Layout and to use Bluetooth test program & fixture...................... 20
3.17 Bluetooth RF Power & Frequency Test.................................................. 20
RF Power Range: -35dBm ~ -5 dBm ...................................................................... 20
3.17.1 HID-Master / Slaves Roles ..................................................................... 20
3.17.2 HID Discovery ........................................................................................... 20
3.17.3 HID-Connectivity...................................................................................... 20
3.17.4 Disconnection / Reconnection............................................................. 20
3.17.5 Bluetooth Keyboard – Out of Range / Idle......................................... 20
3.18 EMI Test.......................................................................................................... 21
3.19 ESD TEST....................................................................................................... 21
3.20 EFT Test.......................................................................................................... 21
4 Environmental and Reliability Specifications.............................................. 22
4.1 Acoustic Noise................................................................................................... 22
4.2 Temperature and Humidity Test............................................................... 23
4.3 Heat Treatment Impact Test...................................................................... 23
4.4 Vibration Test................................................................................................ 23
4.5 Bare Unit Drop Test..................................................................................... 24
4.6 Packaged Box Drop Test ........................................................................... 24
4.7 Life Test.......................................................................................................... 25
4.8 UV Test............................................................................................................ 25
4.9 Spillage Test.................................................................................................. 26
4.10 Endurance Test............................................................................................. 27
4.11 Physical / Software compatibility check................................................ 27
4.12 PLP – Product Liability Program ............................................................ 27
4.13 Abrasion Test – Legend (1X key silk-screen printing)....................... 27
4.14 Abrasion Test - Logo/ Icon........................................................................ 28
4.15 Abrasion Test – Painting (Outlook parts printing).............................. 28
4.16 Chemical Resistance Test......................................................................... 28
4.17 Adhesion Test............................................................................................... 28
4.18 Keycap Texture Endurance Test.............................................................. 28
4.19 Compression Test-Type 1A....................................................................... 29
4.20 Corrugated Box (Carton) Compression Test........................................ 29
4.21 Compliance.................................................................................................... 29
4.22 Safety Standard............................................................................................ 29
4.23 Environment Specification Items ............................................................ 30
4.24 Appearance Specification.......................................................................... 30

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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5 Patent ...................................................................................................................... 30
7 Certifications............................................................................................................. 31
7.1 UL..................................................................................................................... 31
7.2 CE Marking..................................................................................................... 31
7.3 FCC .................................................................................................................. 32
7.4 BC..................................................................................................................... 32
8 Keyboard layouts for different languages................................................................. 32
9 Acronyms / Definitions............................................................................................. 33
1 General Specifications
This specification is applied to the Bluetooth wireless keyboard for pairing with multiple
devices.
General Product Information
Product Type Limitless Universal
Connection Type Bluetooth Wireless
Keypad Features Slim
Wireless Protocol Bluetooth 3.0
Wireless Range 10M
Software Support (at release) Apple iOS, Android, Windows
OS Support (at release) iOS 6, 7, and 8
Indicator Lights (LED) Under Caps Lock, above Power (for Pairing too)
Backlight Yes
Battery Details 450mAh, 3.7V
Battery Life 730 days one hour per day use
Power Charge Micro USB cable ( TPE coated cable)
Power On Function Power key on key frame will power on
Cradle & device(s) angle Fixed position cradle with spacing and angle to fit two
devices at 135 degrees from face of keyboard to
device face.
Cradle length, width & depth Cradle is to be a minimum of 275 mm in length, 13
mm wide, and 11 mm in depth.
Product Dimensions

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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Product component Width Depth/
Length Height Weight
Keyboard 300 mm 202.5 13 mm (back)
8 mm (front,
bezel)
533 grams
2 Mechanical Specification
2.1 Characteristics of Material

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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Parts Material Color Texture
Cover, Bottom, HF-3201GS
PC White/Black Bottom side: See CMF
Bezel, Keys, HF-3201GS PC White/Black MT 11010 Texture
Top Cover, PC White/Black MT 11010 Texture on the perimeter with a
High gloss finish around the keys
Small Bottom Cover PC White/Black High Gloss Finish
Rubber Foot Rubber
50A Black
Cradle PC Black Rubberized Paint
2.2 Packed - Including Packing
Product Dimensions Tolerance: +/- 3 mm
Package Spec. Qty Width Length Height Weight
Gift box with handle
1 19 cm 30 cm 2.8 cm 693 grams
Carton (Inner)
5 30.5 cm 15 cm 21 cm 3.75 KGS
Carton (Outer)
10 32.5 cm 32 cm 23.8 cm 8.26 KGS
2.3 Detachability of Cable Pull Out
The cable entrance for corded devices can meet product specification. Function
test will be performed before and after this test. Refer to the definition of related
standard.
USB Implementers Forum. 2007-01-04. Micro USB connector mating force is less
than 30N, un-mating force is 8+/-1N. Life test is 5000 cycles in this device.
2.4 Key Board Specification
2.4.1 Life Test
Standard key is 5 million cycles and Function key is 3 million cycles. (5
times/second, 65±8gf).
2.4.2 Max Keycap Depressing Force

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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To act on the center of the keycap with stand 5Kgf force for 1 minute.
2.4.3 Keyboard Height
3.20
± 0.20mm（normal key）
3.20
± 0.20mm（space bar）
2.4.4 Max Keycap Depressing Force
To act on the center of the keycap with stand 5Kgf force for 1 minute.
2.4.5 Keycap Strength
To act at “X” and “Y” axis with stand 1Kgf force for 5 sec.
2.4.6 Keycap Spacing And Alignment
Clearance between keycaps (standard keycaps):
Δ H ( Δ V) -- ± 0.30 mm
Alignment (keycap to keycap): Neighbor 0.4 mm max
In a row 0.8 mm max
Height alignment (keycap to keycap): Neighbor 0.4 mm max
In a row 0.8 mm max
Key slant (keycap to keycap): 0.6 mm max
Key X, Y Movement: Shall be ≦0.5mm for full amplitude on both X and y
directions.
Key twisting: Normal key ± 2.0 °

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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Fn Key ± 1.5 °
Space key ±1.0 °
2.4.7 Key In Test Spec On The 4 Corners Of The Key Cap
Unit: mm (All Types)
A: Standard Key
B: Space Bar
C. Enter Key
D: Long Types Key

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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E: Small Key
Key in Force (Center) ≥ 80g
2.5 Characteristics of Switches
2.5.1 Slide Switch
No slide switch
2.5.2 Tact Switch
No tact switch
2.5.3 Sleep Magnet Function
No Sleep Magnet.
2.6 Characteristics of Cradle
2.6.1 Cradle Dimensions
Cradle is 274 mm long, 12 mm wide, and 11 mm deep on the inside slot
dimensions. The wall thickness will be approximately 1.8mm.
2.6.2 Cradle Material
The material for the cradle will be a hard plastic like PC or ABS. Then coated with
a rubberized paint to give it a soft feel. We are evaluating a foam insert to
accommodate different thicknesses of devices. The material will also have a

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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relatively high coefficient of friction to help hold the cradled devices.
3 Electrical Specification
3.1 Electrical Characteristics
1.1.1 Feature:
Bluetooth V 3.0 specification.
Bluetooth HID profile V 1.1 compliant.
Frequency Range: 2.400G ~ 2.480GHz
Peak Power consumption: 0.66 mA Max
Built-in 3.7V, 450mAh Li-Polymer Battery, can be rechargeable.
Sleep mode Power consumption: 0.033 mA Max
Security Encryption: 128 bits
Support AFH (Adaptive Frequency Hopping).
Support Language: US, Europe, Asia
Compatibility with iOS 6, 7, and 8
FCC, CE, BQB, R&TTE, RoHS
Active Range: around 10 meter
Build-in Power on/off Key.
RGB LED indicators for Battery Low alert , Recharge and Bluetooth
Connectivity
1.2 Power Rating

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Items Specifications
1Operation Voltage: Volta
g
e supplied to device: 3.0VDC ~ 4.2VDC
2Active Power consumption 0.75mA Avg
3Standby Mode current 0.35mA Max
4Sleep mode current 0.033mA Max
5Bluetooth disconnect Bluetooth keyboard will disconnect
communication after 10 minutes. The keyboard
will always stay paired so when coming out of
hibernation it will automatically allow keyboard
to work with device with limited time delay.
1.3 LED Indicator behavior
Press Fn + Left Control Key will indicate battery status by LEDs.
• Battery status description:
Battery Voltage Percentage LED Colour Remark
3.8V ~ 4.2V 50% ~ 100% Green Flash 3 times. Each time
flash 1 sec, sto
p
1 sec.
3.5V ~ 3.7V 25% ~ 49% Yellow Flash 3 times. Each time
flash 1 sec, stop 1 sec.
3.25V ~ 3.4V 15% ~ 24% Red Flash 3 times. Each time
flash 1 sec, stop 1 sec.
3.0V ~ 3.2V 0% ~ 14% Red Flash 3 time and flash 1
sec. every 2 Min.
• Power On, Charging, & Pairing:
Function LED Colour Remark
Power On Green LED
above power key
The GREEN LED will turn ON instantly
when power key is pressed. The LED will
turn ON for 2 seconds then turn OFF and
the keyboard will automatically reconnect
with the tablet. If pressed again GREEN
LED will turn on 2 seconds then off
indicatin
g
it is still ON.
Power Off Red LED above
power key The RED LED will blink twice then turn OFF
indicating the keyboard is OFF when the
power key is pressed and held down for 3

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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seconds. When power is turned OFF the
ke
y
boa
r
d with disconnect BT f
r
om the tablet.
Charging Red LED above
power key
RED LED stay ON until cell is full. When cell
is full the LED will turn OFF
Low power Red LED under
power key When battery reaches a critical low level (14%~0%) the back lightning will be
disabled and a RED LED will flash three
times, one flash sequence every 2 minute.
(Cycle ON 1 second OFF 2 minutes) At 20%
Back Light LED’s will turn off.
Bluetooth Pairing Blue LED under
power key Push and hold Pairing key for 3 seconds for
pairing. A BLUE LED under power key will
Flash when pairing. Flash will stop flashing
when paired. Pairing times out after 60 sec.
Bluetooth
channels 3 Channels The first 3 function keys to the right of the
ESC key select the specific Bluetooth
channel
• Back Light :
Function LED Colour Remark
Back Light
(future option)
N/A Space/shim provided in current keyboard
to allow Back Light panel in future version
• Caps Lock:
Function LED Colour Remark
Caps Lock ON Blue LED under
Caps Lock Key
LED Stay on until key is pressed again
• Tablet Bluetooth Display
Function Name Remark
Display in
Bluetooth settings
ZAGG Limitless
Keyboard Zagg Limitless Keyboard Ch1, Ch2 or Ch3
will show in the display of Bluetooth devices
I I havethe tablet detects
• OS Selection
Function Name Remark

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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Display in
Bluetooth settings
ZAGG Limitless
Keyboard Za
gg
Limitless Ke
y
boa
r
dCh1, Ch2 o
r
Ch3
will show in the display of Bluetooth devices
the tablet detects
Android Devices: Fn + a
Apple Devices: Fn + i
Windows Devices: Fn + w
Note: Now the turning ON and OFF of the keyboard through the key frame
is really only toggling between Hibernation Mode and Active Mode and
disconnecting Bluetooth connection when in Hibernation Mode.
To perform a HARD RESET, a micro USB cable needs to be plugged into a
5V power source and then plugged into the keyboard. A GREEN LED
under the power key will come on for 2 seconds then changes to RED
indicating the PCBA has been reset.
For all flashing of LED’s a flash cycle time of 0.5 second ON, 1 second OFF
will be used.
3.2 RF Specifications
Simple data transmitter operation at 2.4GHz range
Modulation: FHSS
Caps Lock ON: Blue LED light
Voltage (Supply): 3.0V
Transmitter Output Power: 1.884 dBm
Receiver Sensitivity: - 86.14 dBm
Range: >= 10m (in no interference environment)
Auto paring: Device starts auto pairing mode after power
on, and leaves after 60 seconds.
RF IC Model for keyboard: Broadcom BT3GMD-B47P is a Bluetooth Human
Interface Device (HID) module based on the Broadcom BCM20730 Bluetooth 3.0
specification basic rate-compliant stand baseband processor with an integrated 2.4GHz
transceiver.

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3.3 Bluetooth Module Block Diagram
3.4 Sleep mode
Auto sleep if no typing for 10 minutes.
3.5 Keyboard layout

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3.6 Fn Combination Key Function Descriptions
Function icon Usage ID Remark Test
Result
Home
Pairing Ch 1 On boa
r
d
Hold three seconds
Pairing Ch 2 On boa
r
d
Hold three seconds
Pairing Ch 3 On boa
r
d
Hold three seconds
Search
Return
Apps Running
Reverse
Play/Pause
Forward
Mute

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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Vol –
Vol +
Lock
Power
On boa
r
d
On push/Off hold three
seconds
Forward Delete
Fn+
Combination Right
cursor arrow + Delete
CAPS LOCK 0x0039 Turn ON
BLUE LED
Back Light SW Fn + Right
A
r
r
ow = ON
/
OFF Back Light
BATT
Fn+ Ct
r
l: to display
Battery charge status.
Start
Alt cmd
Alt cmd
Ctrl alt opt

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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3.7 Bluetooth 3.0 12 inch Keyboard Key Matrix
Note: Red number means Keyboard module Pin out number

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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3.8 Schematic Circuit

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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3.9 Pseudo N-Key Rollover Capability
‘N’ key roller is the numbers of keys that may be held depressed simultaneously
and have the keyboard generate the appropriate code for each pressed and
released key without keyboard interruption. The keyboard is capable of at least a
pseudo 6-key rollover. All combinations of Ctrl, Alt and Shift keys are not ghost
keys.
3.10 Free From Illegal Ghost key
Key matrix layout has been properly managed such that no ghost key occurs for
any 3-key combination. The ghost key is defined as 3-key combination where a
valid third key falls in the ‘#’ pattern in the key matrix, formed by the proceeding
valid 2-key combination. Normally in this case, the third key will be masked
without sending any code because the third key and fourth key in this ‘#’ pattern
are confusing the microprocessor of three keyboard.
3.11 Compatibility
Operation System: iOS 8
Bluetooth 3.0 LE specification compliant.
Bluetooth HID profile V 1.1 compliant
VID/PID in firmware is 0a5c/8502
3.12 Battery Specification
3.14.1 Charging Specification
Charging current: 180mA
3.14.2 Battery Capacity
A fully charged battery is discharged using an analyzer to get its capacity. The
charging and discharging is done 3 times. The average measured capacity
should be at least 80% of original capacity.
3.14.3 Short time charging of Battery
The 30 minutes short time charging using the USB connected to a standard 110V
outlet should provide a battery life of at least 20% of the rated capacity.
3.14.4 Charging Profile of Battery
The charging profile of the battery charged by a particular method using wired
charger/laptop/wireless charger should be good. It includes the time taken to fully
charge the battery, average charging rate, and the charge capacity after being
charged for 10 hours. The charged percentage of the measured cycled capacity
should be at least 80%.
3.14.5 Standby and Active time of Battery
Standby time should be a minimum of 1000 days. Active time should be a
minimum of 730 days, 1 hour per day average.

3855 South 500 West Ste Q | Salt Lake City, Ut | 84115 | 801.506.7081
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3.14.6 Under Voltage and Over Voltage Protection in Battery
During high or low voltage condition applied to the battery accessory, the
protection circuitry should be triggered. The voltage cutoff level should prevent
damage to the accessory. This is to ensure the circuit will protect the user in the
event that the battery is exposed to a high/low voltage from misuse or an
incorrect charger being used.
3.15 Keyboard Module
Key matrix traces with switch contact fingers are laid out and routed on a 3 layers
membrane sheet and scissor keycap as a key module. The contact resistance is
less than 1000 ohm.
3.16 Key Functional Test
Refer to Key Layout and to use Bluetooth test program & fixture.
3.17 Bluetooth RF Power & Frequency Test
RF Power Range: -35dBm ~ -5 dBm
Frequency tolerance: +/- 75 KHz
Low Frequency: 2402 MHz
Middle Frequency: 2441 MHz
High Frequency: 2448 MHz
3.17.1 HID-Master / Slaves Roles
The Limitless Keyboard must be connected as slave to Bluetooth Master(s).
3.17.2 HID Discovery
The Limitless Keyboard must be available in discovery mode in order to connect
to any host.
3.17.3 HID-Connectivity
The Limitless Keyboard must get connected automatically to Host after once it is
discovered by the Host. Limitless keyboard has one to one pairing at each BT
channel. Once connected, the Limitless Keyboard should not be discoverable by
any other BT devices. With 3 channels of connectivity, the host will only be able
to discover the keyboard when the specific channel previously paired to that host
is selected.
3.17.4 Disconnection / Reconnection
The Limitless Keyboard should be able to disconnect from Host and should not
initiate re-connection on its own but only make itself available for connection to
the host by selecting the specific BT channel.
3.17.5 Bluetooth Keyboard – Out of Range / Idle
Out of Range/Link Loss –When Limitless Keyboard goes out of range the host
should terminate the connection. Once the Limitless Keyboard is back in the
range the host should be connected with keyboard automatically if the BT