intelligent induction: when people come, the lighting device automatically opens; when people leave, the lighting device automatically closes. intelligent delay: switch in the detection of the human body after each activity will automatically add a delay time, and the last activity as the starting point of the delay time. working mode: after the induction switch is connected, in the time delay time, if there is a human activity, the switch will continue to connect, until the people leave after the delay is closed. Material:Plastic,Metal Color:White Green Supply current: DC12V-24V TTL output Delay time:9s Operation Temperature:-15 Celsius -70 Celsius Infrared sensor:dual element, low noise, high sensitivity Size: Approx 90 x 60 x 45mm(3-35/64x2-3/8x1-49/64 inch ) NOTE: Do not in rapid environmental changes. Do not in strong shock or vibration. Do not in a place where there are obstructing material(eg.glass) through which IR can not pass within detection area. Do not exposed to direct sun light Do not exposed to direct wind from a heater or air condition Do not live installation, no load short circuit. Package Contents: 4 x Automatic Infrared PIR Motion Sensor Switch 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.