Owfeel DC 12V 4 Channels Smart Wireless Remote Control Switch Inching Self-Locking with Two Black&White Type Transmitters 1.Encoding Wireless Transmitter Remote Control Switch 2.Easy to install and use. The wireless signal can pass through walls, floors and doors 3.Turn on or turn off the receiver with transmitter (remote control) from any place within a reliable distance 4.Using large-capacity relay, can control appliances and equipment of more than 1000W 5.Applies to: remote control electric doors, windows, switches, door control LED lamps, motors, circuit