The wireless doorbell kit with one receiver,you can install the chime where as you like as it plugs in to a normal socket .
There are 48 melodies for your option.Just press the forward and back button to choose your favourite.
You can adjust 4 levels of the volume from 25db-75b
Waterproof transmitter,so you can install it on the outside.
There is a transparent compartment at the bottom of the transmitter that you can leave message to each other.
When you press the transmitter button, it will give you a blue flash light to add an additional alert for the hearing impaired. The receiver will also flash white light when receiving the signal.
Just plug receivers into the electrical outlet (no batteries required for main receiver) and install the transmitter through included double-sided tape
You can customize your doorbell with several transmitters and receivers for your requirements.
Note: The battery for transmitter has been installed. Please pull out the insulating strip before using
Receiver Working Voltage: AC 110V-AC 220V 50Hz/60Hz
Battery in Transmitter: 12V 23A alkaline battery
Power Consumption of Transmitter greater than10mW
Operation Range: 100m (Open Space)
Selectable Ringtone: 48pcs
Volume Range: 25-75db;4 levels
Working Frequency: 433.92 MHz±280KHz
Working Temperature: -30℃~70℃
1*Transmitter (DC powered & A 12V 23A alkaline battery included)
1* Receivers (AC powered)
1*Double-sided adhesive tape