Plantronics 665 User manual

User Guide
Bluetooth
®
Headset with Digitally Enhanced Sound for Clear Conversations

WELCOME
Thank you for purchasing a Plantronics headset.
Let us provide you with the best possible service and technical support. After you
review this user guide, if you need additional assistance or have any product
questions, please contact:
•www.plantronics.com/support
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so we can provide you with the best possible service and technical support.
TABLE OF CONTENTS
Package Contents & Features 3
Charging 4
Pairing 6
Powering 7
Adjusting Fit 8
Using Your Headset 9
Indicator Lights 11
Optional Accessories 12
Troubleshooting 13
Product Specifications 13
Technical Assistance 14
Warranty 14
Regulatory Notices 15

3
PACKAGE CONTENTS & FEATURES
PLANTRONICS DISCOVERY
TM
655 AND 665
Vehicle
charging
adapter
USB charge cable
Mini USB-to-USB
chargingcable
DISCOVERY 665 ACCESSORIES
AC charger
DISCOVERY 655 ACCESSORIES
Indicator light
Call control button (on/off)
Volume/mute buttons
Microphone
Soft gel ear tips
Earloop
AAA
battery
small
medium
large
Headset
charging
pocket
AAA
battery
charger
Mini USB
charger

4
CHARGING
PLANTRONICS DISCOVERY 655
Before using, you must first charge your headset.
1hour = minimum charge 3 hours = full charge
A
B
DISCONNECTING COMPONENTS
To separate components, grasp both the battery charger and the charging pocket
with the shirt clip facing you. Bend the components back and they will snap apart.
NOTE Do not twist the components apart.
CAUTION
Only replace with a non-rechargeable AAA battery.
Option A: Using the included AC charger
The indicator light flashes red while charging and
turns off when fully charged.
1. Plug the AC charger into the base of the charging
pocket and connect it to your power source.
2. Insert the headset into the charging pocket.
Option B: Using a AAA battery
One AAA battery recharges the headset to full capacity
up to three times.
1. Twist the bottom of the AAA battery charger
counter-clockwise and release the battery holder.
2. Insert the battery into the AAA battery holder.
3. Slide the battery holder back into the battery
charger and turn clockwise.
4. Snap battery charger to charging pocket.
Ensurethat the indentation on the battery
charger connector aligns with the shirt clip on
the charging pocket.
5. Insert the headset into the charging pocket.

5
CHARGING
Mini USB
charger
C
Option C: Using the Mini USB-to-USB
charging cable
1. Snap the mini USB charger to
the charging pocket.
2. Use the mini USB-to-USB charging
cable to connect the headset to your
computer or laptop.
3. Turn your computer or laptop on.
PLANTRONICS DISCOVERY 665
Before using, you must first charge your headset.
1hour = minimum charge 3 hours = full charge
Option A: Using the vehicle charging adapter.
1. Snap the headset charging pocket onto the
vehicle charging adapter as shown.
2. Plug the vehicle charging adapter into vehicle
power socket and adjust the charging pocket
angle so that the headset is within easy reach.
CAUTION Select a mounting option that does
not interfere with car controls.
3. Dock the headset into the charging pocket
as shown. If power is available to the vehicle
power socket, the charging pocket will flash
when the headset is docked.
NOTE The headset charges only when power
is supplied to the vehicle power socket.
The green indicator on the vehicle charging
adapter lights when power is supplied.
Option B: Using USB charging cable
1. Use the USB charging cable to connect the
headset charging pocket to your computer
or laptop.
2. Turn your computer or laptop on.
1.
2.
3.
12 Volts
12 Volts

6
PAIRING
Before using your headset for the first time, you must pair it with your Bluetooth
phone or device. Be sure the headset is fully charged. For set up and pairing
instructions with Bluetooth devices other than mobile phones, please consult your
Bluetooth device user guide.
Begin with headset turned off.
1. Press and hold down the call
control button for 10 seconds
until the headset status indicator
begins toflash red then blue.
The headset is now in pairing
mode for the next 120 seconds.
2. While the headset is flashing,
use the phone menu to search
for Bluetooth devices and select
“6xxPlantronics”.
3. When prompted for a passkey,
enter 0000. Headset will flash
blue when paired successfully.
1. 2.
3.

7
POWERING
CHARGE LEVEL INDICATION
When the headset is turned on, the
indicator light will briefly show the
headset charge level.
1. Turn on the headset by pressing
and holding the call control button
until the indicator light glows blue.
If you are wearing the headset, you
will hear a beep when the power
turns on. The indicator light will
flash blue every 5 seconds when
the power is on.
2. Turn off the headset by pressing
the call control button for 6-8
seconds until the indicator light
glows red or until you hear the
beep. The indicator light remains
unlit when the power is off.
3red flashes = greater than 2/3 battery charge
2 red flashes = 1/3 to2/3 battery charge
1red flash = less than 1/3 battery charge

RL
Right Ear
Left Ear
NNN
8
ADJUSTING FIT
The Plantronics Discovery 655 and
Discovery 665 headsets come with
three soft gel ear tips and an optional
ear loop.
1. The medium-sized ear tip is pre-
installed and aligned for wearing
on the right ear (R).
2. For left ear wearing, twist the ear
tip counter clockwise.
3. Placethe headset into your ear and
check to see that it fits comfortably.
If the headset is either too tight
or too loose, remove the medium-
4.
3.
1. 2.
The ear loop may be attached to the
headset toimprove stability.
1. Remove the ear tip from the
headset by turning the ear tip to
the center or neutral position and
pulling the ear tip away from the
headset.
2. Attach the ear loop between the
ear tip and the headset.
3. Replace the ear tip.
USING THE OPTIONAL EAR LOOP
sized ear tip from the headset by
turning the ear tip to the center
or neutral position.
4. In the neutral position, the ear tip
can easily be removed by pulling
the ear tip directly away from the
headset.
Next, select the ear tip size that
fits most comfortably in your ear.
Hold the ear tip with the elongated
edge pointing down toward the
neutral position and then push
the ear tip onto the headset.

9
USING YOUR HEADSET
ANSWERING/
ENDING/MAKING
CALLS
To answer or end a call, briefly press
the call control button.
To make a call, enter number on your
phone, press send, and the call is
automatically transferred to the
headset; no need topressthe call
control button.
NOTE When answering a call, wait
until you hear a ring from the headset
itself (not the ring from your phone),
before pressing the call control button.
AUTO ANSWER
If the headset is placed in the carrying
pocket when a call is received, the
charging pocket will vibrate (Discovery
655) or light up (Discovery 665)
when connected topower.Removing
the headset from the pocket will
automatically answer the call.
Returning the headset tothe
charging pocket will end the call.
ADJUSTING
VOLUME
To increase listening volume, press
the upper end (+) of the volume/mute
button. To decrease listening volume,
press the lower end (-).
CAUTION Do not use
headphones/headsets at high
volumes for an extended period of
time. Doing so can cause hearing
loss. Always listen at moderate levels.
MUTE A CALL
Toturn the mute on while on a call,
press both sides of the volume/mute
button simultaneously until you hear
abeep.
Toturn the mute off, press both
buttons again.

10
USING YOUR HEADSET
ADDITIONAL FEATURES
Redialing Last Number
To activate last number redial, double
press the call control button. You will
hear a high tone after each double
key press.
Power Saving Mode
Power saving mode temporarily
disables the digital signal processing
(DSP) feature of the Discovery 655 and
665 headsets to provide a longer talk-
time. To enable power saving mode,
press both the volume up and down
keys at the same time before you
make a call. To re-enable DSP, press
both the volume up and down keys at
the same time. Power saving mode
cannot be turned on while engaged in
acall.
NOTE After you turn off the headset,
DSP will be re-enabled the next time
you turn it on.
Using Voice Dialing
With the headset on, press and hold
the call control button for 2 seconds
to activate voice dialing.
NOTE To use voice activated dialing,
the voice dialing feature must be
enabled on your phone. See your
Bluetooth phone manual for
instructions.
Rejecting a Call
When receiving an incoming call,
press and hold the call control button
for 8 seconds to reject the call.
Switching a Call from Phone to Headset
To switch an active call from your
phone to your headset, briefly press
the call control button for 2 seconds.
Switching a Call from Headset to Phone
To switch an active call from your
headset to your phone, press and hold
the call control button for 2 seconds.
MOVING OUT OF RANGE
As the headset moves more than 33 feet (10 meters) away from the Bluetooth device
or encounters interference:
•Audio quality will degrade
•Abeep will be heardin the headset when the connection drops between headset
and Bluetooth device
•When out of range, onlythe power off function will operate
If any of the above occur, move closer to your Bluetooth device.