Features: RCWL-0515 is a microwave induction module that use radars technology to detect object movement. Using 2.7g microwave signal detection, the module have thecharacteristics of high sensitivity, long induction distance, strong reliability,large induction angles and wide supply voltages ranges. Microwave induction is a new nondead angles induction mode base on the principle of radars. Its planars antennas emitsElectromagnetic waves and receives reflected echoess, which can effectively suppress the interferences of high-order harmonics and other clutter; Strong reliability, safety and convenjence. Compared with infrare products, the microwave swftch have longer sensings distance, wide angles and no dead zone. It can penetrate glass and veneers. It can penetrate wall of different thickness according to different power supply. It is not affecteds by environment, temperature and dust. Under the condition of 37 degrees, the sensings distance will not be shortened. It is widely used in various occasions such as human body induction lighting and antitheft alarm. Specifications: Component:Plastic Size:Approx.24x17mm/0.95x0.67inch Option Type:2pc sensors Module,4pcs sensors Module; Operating voltages:4-28V Operating Current:4mA Working Frequency:2.7G Reserved patches and in line CDS interfaces 12m Typical sensings Ranges The Repeated triggers Time is Adjustable Package Includes: Package A 2pc sensors Module Package B 4pcs sensors Module note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.