Wireless Doorbell Receiver Transmitter Battery Powered Simple Outside Waterproof Intelligent Remote Control

Features:
Rear horn, loud voice.
Adjustable ringtones and volume. 4 gears volume, 36 chord music.
Strong penetration, long distance transmission, 300 meters of the straight distance.
The transmitter has a waterproof design and meets IP44, extend service life.
Suitable for ordinary buildings, villa, housing, hotel apartment, office area, etc.