1. In addition to the movement of the human body induction sensitive, for the traditional scheme can not identify the micro-type human body can also be sensitive induction 2. Have good environmental adaptability, the induction effect is not affected by the temperature, brightness, humidity and light fluctuations and other surrounding environment 3. Not easy to be affected by dirt, dust and other cover interference 4. Can pass through the glass, plastic, ceramic, acrylic, rubber, wood board and other non-metallic materials 5. The maximum induction distance is up to 10 meters Support the hanging roof, hanging the wall and other installation methods. Specifications:LD500B-NPN NPN signal analysis: if there is induction, the output is low level (negative pole), if there is no induction, it is disconnected Color: White Material: ABS Package Contents: 1 * Microwave Radar Motion Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.