Features: 1. microwave sensors using planar antenna and receiving echo. , 2. The switch is active sensors. , 3. The sensors emit a high-frequency electromagnetic waves and receives their echo.
4. The sensors detect changes within echo. , 5. The sensors detect tiny movement in detect range. , 6. Send signal to MCU and execution instruction.
7. Signals are likely to be detected through the door, glass and thin walls. , 8. It will get best probe result if person or object when moving toward the sensor. , 9. This product is a strong anti-jamming capability, almost without wind, heat and other environmental factors foreign interference
It's brand new, good quality & high performance. ** PLS PAY ATTENTION the accurate size & voltage rate before placing order in order to avoid buying wrong thing. Free Shipping & the deliver time to USA is approx. 10-18 days after the shipment date.