Better Seller 120 Degree 110-130v Ac Black Color Infrared Motion Sensor Switch Pack of 1 The PIR motion sensor switch adopts good sensitivity detector, integrated circuit. it gathers automatism, convenience, safety, saving-energy and practicality functions. the wide detection field is consisting of detectors. it works by receiving human motion infrared rays.when one enters the detection field, it can start the load at once and identify automatically day and night.its installation is very convenient and its using is very wide.it has functions of power indication and the detection indication Can identify day and night: The consumer can adjust work ambient light. it can work in the daytime and at night when it is adjusted on the "sun" position (max). it can work in the ambient light less than 3LUX when it is adjusted on the "moon" position (min) Time-Delay is added continually: when it receives the second induction signals after the first induction, it will compute time once more on the basic of the first time-delay rest Time-Delay is adjustable. it can be set according to the consumer's desire.the minimum time is 10sec3sec. the maximum is 7min2min