Unique 433MHz RF wireless remote control switch with stable and reliable performance, and receiver sensitivity (-105dBm). A strong signal can penetrate walls, floors, and doors, controlling the receiver from anywhere within a reliable distance. Maximum range is up to 164 feet without obstacles. Easy to Use: Extremely easy to install and reset. Choose from 3 working modes (momentary/toggle/latched mode). You can easily configure it yourself according to your needs. The product's working mode is adjustable. This item has already been configured in latched mode, with the ON button to turn on and the OFF button to turn off. High Sensitivity: The receiver uses a 30A relay that can load large electrical appliances to ensure long-term stability control. Each receiver can store about 20 transmitters, and one transmitter can also control multiple receivers (the transmitter must match the receiver). Quality Assurance: High-quality relays can be used over 100,000 times, making this product more stable and reliable. High-current terminals can withstand 30A current, so this product can perform well even when the current is unstable. The receiver is suitable for 85V~240V voltage, making it more flexible to use. Wide Application: Products can be used in homes, farms, factories, offices, laboratories, supermarkets, etc. You can remotely control each device connected to the relay receiver via the remote control, such as lights, pumps, wireless security alarms, fans, lamps, ventilation devices, monitors, printers, fountains, and other electrical equipment, etc. Secure System: The chip code is EV1527 learning code, the most popular technology that makes the remote control system more stable. Strong Signal Reception: There is an antenna on the receiver, so you can extend it yourself for better signal reception. The remote control distance can be up to 50 meters. More Flexibility: Extremely easy to install and reset. You can easily add additional wireless switches yourself according to your needs.