Denver DRO-121 User manual
AUTO HOVER FUNCTION
4-AXIS DRONE
DENVER DRO-121
Thank you for choosing this product.
Please read this manual carefully before flying.
Retain this manual for future reference.
The images are for reference only.
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CONTENTS
⚫Remote control X1
⚫Quadcopter X1
⚫Protective
guard x 2
⚫USB
charger X1
⚫Instruction
manual X1
⚫3.7V 350mAh
Lithium battery X1
⚫3.7V 350mAh
⚫Propellers X4
⚫Screwdriver X1
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CONTROLS
REMOTE CONTROL BATTERY INSTALLATION
1: Use a screwdriver to remove the battery cover.
2: Install 3 x AAA batteries.
3: Replace the battery cover.
Note: Please follow the above illustration to install the batteries correctly.
Headless mode
Power switch
Direction lever
Backward trimming
Calibration
Rightward trimming
Press and hold: One-button
rotation
Leftward trimming
Short press: 3D flip. This feature
is not available in the aerial
version.
Throttle lever
Speed button
One-button return
Light
Emergency stop
3 x AAA batteries
One-button take-off/landing
Forward trimming
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AIRCRAFT BATTERY CHARGING
Insert the battery connector to the small end of the USB charger
(ensure to connect tight and correct).
Use the USB charger to charge the aircraft battery pack.
Charging time: about 60 minutes. When the battery is charged
completely, disconnect the USB charger.
LED indicator USB
When the LED turns off the battery is charging. When the LED lights up, charging is completed.
Charging must be supervised at all times.
PAIRING TRANSMITTER AND RECEIVER
Step 1
Set up the drone level and insert the Li-Po
battery as shown in the illustration. Switch the
drone on and do not move it until the LED
changes from fast to slow flashing. Now the
remote control can be paired with the drone.
Step 2
Turn on the drone first, then the controller. The
controller will emit a beep tone when it is turned
on.
The LED of the drone will change from flashing to
solid, indicating that the controller and the drone
are now paired.
CAUTION
Press once to switch
on; the LED turns on
Li-PO
3.7V/350mAh
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Step 3
Remove the drone’s battery after flight.
Develop correct habits so as not to cause security
risks.
Warning: If the battery is not removed from the
drone for long period of time, it may be damaged
due to over-discharge, or even become a fire
hazards.
If the transmitter is not to be used for a longer period of time,
remove the battery for storage.
Step 4
Turn off the transmitter. If transmitter is not to
be used for a longer period of time, remove the
batteries for storage.
Warning: If the AAA batteries are left in the
transmitter, potential leakage may occur which
may damage the transmitter, and create fire
hazards.
FLIGHT ADJUSTMENT AND SETTING
Read all instructions carefully before flying.
1. Place the aircraft in an open field with the tail pointing in your direction.
2. Practice to operate the throttle stick (as below illustration).
TRIM
Slowly raise the throttle to lift off. If it tends to different direction, use the Trim button for
correction.
Forward and backward trim.
1. When the aircraft is starting to take off and it drifts forward/backward.
Li-PO
3.7V/350mAh
Ascend
Descend
Forward
Backward
Turn left
Turn right
Move left
Move right
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When drifting forward, adjust the Trim button to rear until it is balanced
When drifting backward, adjust the Trim button to forward until it is balanced.
Leftward and rightward trim
2. When the aircraft is starting to take off and it drifts left /right.
When drifting leftwards, adjust the Trim button to the right until it is balanced.
When drifting rightwards, adjust the Trim button to the left until it is balanced.
RECALIBRATION
If the trim buttons do not correct the problem, place the
drone on a flat surface and recalibrate as follows.
Press the calibration button; the LED on the drone will start
flashing. Wait until the indicator stops flashing. It is now
completed.
HEADLESS MODE
When syncing, the antenna of the transmitter must be aligned the tail of the quadcopter.
In normal flight, when pressing the headless button, two beep tones are emitted and the LED
flashes. Press this button again, to exit headless mode; a beep tone is emitted.
ONE-BUTTON RETURN
When the quadcopter is flying far away, one-button return can recall the quadcopter. After
pairing the quadcopter, the antenna of the transmitter must be aligned with the tail of the
quadcopter at take off. Press the one-button return button to access return mode; the LED
flashes. Press the button again to exit return mode. When returning, the forward and backward
movement of right joystick will interrupt this function.
HIGH SPEED AND LOW SPEED
The default speed is low speed. Press the button to switch to medium speed, press again to
switch to high speed.
3D FLIP
Calibration
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When you are familiar with basic flight operations, you can do some awesome and exciting tricks
an stunts! First of all, fly the aircraft to a height of more than 3 meters, press the 3D button on
the rear right side of the transmitter, then push the right rudder (in any direction) to make 360
degree flip.
(Important Note: Remove the connector of the camera when flying 3D flips)
PROPELLER GUARD INSTALLATION
Install the propeller guard to the four frame clamps as shown below:
WARNING!
Lithium battery inside.
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Please notice - All products are subject to change without any notice. We take reservations
for errors and omissions in the manual.
ALL RIGHTS RESERVED, COPYRIGHT DENVER ELECTRONICS A/S
Electric and electronic equipment and included batteries contains materials, components
and substances that can be hazardous to your health and the environment, if the waste
material (discarded electric and electronic equipment and batteries) is not handled correctly.
Electric and electronic equipment and batteries is marked with the crossed out trash can
symbol, seen above. This symbol signifies that electric and electronic equipment and
batteries should not be disposed of with other household waste, but should be disposed of
separately.
As the end user it is important that you submit your used batteries to the appropriate and
designated facility. In this manner you make sure that the batteries are recycled in
accordance with legislature and will not harm the environment.
All cities have established collection points, where electric and electronic equipment and
batteries can either be submitted free of charge at recycling stations and other collection
sites, or be collected from the households. Additional information is available at the technical
department of your city.
Hereby, Inter Sales A/S declares that the radio equipment type DRO-121 is in compliance
with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at
the following internet address: www.denver-electronics.com and then click the search ICON
on topline of website. Write model number: DRO-121. Now enter product page, and RED
directive is found under downloads/other downloads.
Operating Frequency Range:
Max Output Power:
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