1 Button 315MHZ Wireless RF Switch Relay Remote Control + Receiver Controller The remote control is designed with beautiful exterior. Sound wave resonator (SAW) is used for stabilizing frequency. It's applied for wireless alarms, security system, remote controlling devices, etc. Applications: Widely used in various anti-theft alarms, security systems, remote controlling devices, motor-driven curtain, roller blind door, garage/gate barriers, motorcycles, short-range and long-range wireless remote control products, industrial control products 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. It mainly used in electric doors, windows, lifting equipment, gateways, industrial control, security and protection field (wired to wireless switching system).