The wireless relay remote control switch, which uses 433MHz frequency radio frequency technology, has a strong signal that can pass through walls, floors, doors, and the EV1527 learning code chip makes the system safer remote control. You can control every device connected to the relay receiver via the transmitter from anywhere within a reliable distance. Extremely easy to set up and reset. There are 3 working modes (Momentary / Toggle / Latched mode). You can easily set up according to your needs. The operating mode is adjustable. This item has already been configured in locked mode. And the "ON" button to turn on and the "OFF" button to turn off. 30A high power relay remote control switch. Products can be used in homes, farms, factories, offices, laboratories, supermarkets, etc. Wireless remote control applications range from simple household remote controls to automation such as lights, water pump, water heater, wireless security alarm, fan, lamp, wireless door alarm, ventilation device, monitor, printer, fountain and other electrical equipment, etc. Voltage: AC 85V~265V Max current: 30A RF frequency: 433MHz Support encoding: 1527 learning code Receive sensitivity: > 97dbm RF working mode: ASK superheterodyne wireless reception Working temperature: -30~+80 Receiving range: Open space is over 50 meters Quiescent current: <5 MA 1x RF relay receiver Remote controls (battery included)