Product information:
Model: A02-DC USB receiver
Power supply mode: DC
Power supply voltage: 5 (V)
Ringtones: 60 music 5 levels of volume
Power consumption: 0.5 (W)
Scope of application: 150 meters above ground in open space (provided by factory test and test)
Type: wireless doorbell

Features:
Stylish and simple design
Easy to install
60 polyphonic ringtones of your choice
5 levels of optional volume adjustment

Technical parameter:
Working voltage 5V/USB Working frequency 433.92 MHz +-280 KHz
Power consumption 10 mW Transmitting power 0dbm
Sensitivity -110dbm Net weight 31g
Volume 0-110db size 56*56*16mm

Dingdong installation:
Choose a suitable range from the video doorbell to install. Plug the USB plug directly into a conventional USB jack, such as a computer, notebook, charging head, etc. After the installation is successful, you Can press the transmitter and the indoor receiver will play music and flash.
Pairing: Dingdong machine volume button for 4 seconds, the LED light is on. Then press the outdoor unit button, the Dingdong unit can receive the outdoor unit signal normally, and the pairing is complete.
1. Select music: After the receiver is powered on, short press the forward button on the right side of the receiver to play the previous music, and short press the backward button to play the next music. A Total of 60 pieces of music can be selected, and they can be repeated in a loop.
For example, 2 external phones need to be configured with different voices, after tuning the music, pair them according to the pairing method
2. Adjust the volume: Short press the volume key once to increase the volume by one level, a total of five levels, in a loop.
Note: One receiver can code 8 transmitters. One transmitter can be used for an infinite number of receivers at most.
3. Clear: Press and hold the volume key until it is plugged into the socket for 8 seconds, and you see the light on, you can clear the pairing

Packing list:
Plastic doorbell x1

Indoor Dingdong Machine Wifi Video Doorbell