This for -SR501 PIR motion sensor can turn on devices by detected motion.Automatically and quickly open various types of incandescent, fluorescent lamps, buzzer, automatic doors, electric fans, automatic washing machine and dryer Machines and other devices.Using Potentiometer 105, output timing is from 0.5S to 200S. Operating voltage range: DC 4.5-20V; Quiescent Current: less than 50uASuitable for companies, hotels, shopping malls, warehouses and family aisles, corridors. Or use for the security zone automatic lighting, lighting and alarm systemsProduct Name: for -SR501 Body Sensor ModuleTrigger: L can not be repeated trigger/H can be repeated trigger (Default repeated trigger)It has pin header to select trigger modeName: Sensor Modulecolour:GreenMaterial:PCBPackage Contents:5 x Sensor ModuleOnly the above package content, other products are not included.Note: Light 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.