Features:
* Wireless smart doorbell with 1 remote button & 1 receiver.
*3 levels of adjustable volume from volume from 20d B to 80d B, with 38 melodies for choices.
* Operating range of over 100 meters, can be widely used for home, office, warehouse, etc.
* Waterproof: Waterproof IP65, can be used in outdoors & indoors places.
* Low power consumption, signal stability, strong penetrability & safety voltage.