Infrared Sensor Electronic Guest Welcome Doorbell

Infrared Sensor Electronic Guest Welcome Doorbell
1. Microcomputer technology and automatic human sensitivity
2. Energy saving and easy to use
3. Special sound device, Strong sensitivity, non mislead and anti interference technology make it effectively detect he movement of the human in the detecting area of all environments
4. AC /DC operation meets different needs. It is suitable for dwelling houses, tier buildings, multiple apartments, hotels, factories, hospitals or any other places. It does not only bring the convenience but also the beat all happiness and security sense
5. Effective alarming detecting distance is 10m. Effective angle 110 degree. Dona??t surpass this area when you install it
6. Power Supply: 3 x AA batteries (not include)
7. Material: ABS
8. Size: 10 x 6.5 x 3.3cm