The wireless relay remote control switch, which uses 433MHz radio frequency technology, has a strong signal that can penetrate walls, floors, doors, and the EV1527 learning code chip makes the remote control system more secure. You can control each device connected to the relay receiver via the transmitter from any location 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 working mode is adjustable. This item has already been set up in Latched mode. And the "ON" button for power on and the "OFF" button for power off. 30A High Power Relay Remote Control Switch. The 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