Wireless Non-Contact Switch Kit

New Wireless Non-Contact Switch Kit, Model Number AN-IS57B5-SK1
1. Detection range:3-30cm adjustable
2. Switch size:88*88*20mm 
3. Receiver size: 86*36.5*20mm
4. Battery saving design, 2 Years(Based on 150 Operations/day) 
5. Surface mounting version
6. It will not trigger by sunlight and maintain ultra-low power consumption 
7. Battery voltage detection function
8. Curved surface design, looks more high-end and beautiful
9. Buzzer(No/Off set by a DIP)
10. 2pcs AA battery holder
11. Build-in transmitter(Default)