Infrared Sensor Electronic Guest Welcome Doorbell(White) Filter-Silicone / Sticker 5) 800/1600 dpi can adjust

5) 800/1600 dpi can adjust the speed of cursor

User manure x 1

Retractable anti-skid baffle design to prevent the computer from slipping

High-density waterproof polyester fabric

Infrared Sensor Electronic Guest Welcome Doorbell(White) Filter-Silicone / Sticker 5) 800/1600 dpi can adjust1. 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