Advanced microcomputer technology and automatic human sensitivity are applied to the guest saluting and alarm doorbell. Extra-ordinary performance, energy saving and easy to use. Special sound device.

Strong sensitivity, non-mislead and anti-interference technology make it effectively detect the movement of thge human in the detecting area of all enviroments. meets different needs. it's suitable for dwelling house, tier buildings, multiple apartments, hotels. factories, hospitals or any other places. It doesnt only bring convenience but also the be at all hapiness and security sense.