【Unique Design】433 MHz RF wireless remote control switch. Stable and reliable performance, receiving sensitivity (-105 dBm). Strong signal can penetrate walls, floors, and doors. It can penetrate walls, floors, and doors and control the receiver from anywhere within a reliable distance. The maximum operating range can reach 50 meters without obstacles. 【Easy to Use】: Extremely easy to set up and reset. There are 3 operating modes to choose from (momentary/toggle/lock). You can easily set it up by yourself according to your needs. The operating mode of the product is adjustable. This item has already been set up in lock mode. The ON button is used to turn on the power, and the OFF button is used to turn off the power. 【High Sensitivity】The receiver uses a 30A relay, which can load large household appliances to ensure long-term stability control. Each receiver can store about 20 transmitters. One transmitter can also control multiple receivers (the transmitter must match the receiver).