DCOT Waterproof New EU Plug-in DoorBell Kit Door Bell Easy Install 28 Rings Smart Door Bell

Simple design, elegant, chic style;
low-power design, energy saving and sustainable use;
300 m long distance remote control, stable signal;
28 polyphonic tones for optional;
Adjustable indoor volume.

Voltage Range：AC：110V-220V
Operating temperature:－10℃－55℃
Transmission distance:300 meters in opening area
Operating Frequency:433.92MHz±200KHz
Volume: 25－110dB
Power:0.1W

Outdoor transmitter
Voltage Range：DC12V 23AAlkaline batteries*1
Operating temperature:－20℃－65℃
Transmission distance:300 meters in opening area
perating Frequency:433.92MHz±200KHz
Volume: 25－110dB
Power:0.1W
The transmitter is installed outside the door, the receiver is installed on the power socket,