This for -SR501 PIR motion sensor can turn on devices by detected motion.Automatically and quickly open various types of incandescent, fluorescent , 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 Product 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.