Box contents 1 receiver with case. 3 remotes with battery (if you need extra remote, please tell us). Parameters. Range: 50 m. Operating temperature: -10°C to +70°C. Supply voltage: 220 V. Maximum operating current: 10 A. Operating frequency: 433 MHz. Maximum power: 1000 W Coding type: learning code Control mode description: Toggle (Press the button -> Open; Press the button again -> Closed.) Latch (Press button -> Open, Press other button -> Closed.). Momentary (Press and hold button -> Open; Release button -> Close.). Weld Control Mode No Contact = Momentary 2-3 Latch 1-2 Toggle Learning Method Press and hold the learning button for two seconds, and the light goes out, then press any button on the remote control, and the light on the remote control flashes, it means the reading is successful .