It has a five-level volume adjustment, user-friendly design and IP44 waterproof design, brilliant weather protection, no fear about rain. Contains a more powerful chip, 150 meters remote control, anti-interference, low power consumption. It is Easy installation with the help of a tape, no extra modification or drilling. Wide application to office, hospitals, villas, shopping malls, hotels, apartments, homes and etc.
When a guest presses the transmitter outside the door, current is converted into wireless signal, the signal is transmitted to the receiver and converted into current, then the bell rings and the light flashes to prompt you.