ELENKER DC 12V 10A Relay 1CH Wireless RF Remote Control Switch Transmitter with Receiver Upgrade new high-speed diode, Soundwave resonator(SAW)to keep stabilizing frequency. This product is already matched, just simply connect the line and get it to work right away. Wireless coding technology, no direction, switch without disturbing each other, you can turn on or turn off the receiver with transmitter(remote control)from any place within a reliable distance. The strong signal can pass through walls,floors and doors,control receiver from any place within a reliable distance. The receiver controller receives and stores the signal from remote control,dispensing with traditional jumpers or switches coding with its high confidentiality,large storage,stable performance. Applications: Widely used in various anti-theft alarms, security systems, remote-controlled devices,motor-driven curtain, roller blind door, garage/gate barriers, motorcycles, short-range and long-range wireless remote control products, industrial control products.