Unique design 433Mhz RF wireless remote control switch. Stable and reliable performance and reception sensitivity (> - 105dBm). Powerful signal can pass through walls, floors and doors. It can pass through walls, floors and doors to control the receiver from anywhere at a reliable distance. The maximum range is up to 164 feet without obstruction. Easy to use: extremely easy to set up and reset. There are 3 operating modes (momentary/switching/locking mode) to choose from. You can easily configure it yourself to suit your needs. The product's operating mode is adjustable. This product is already configured for the lock mode. While the "ON" button is on, the "OFF" button is off. The high sensitivity receiver uses a 30A relay. It is able to charge high power appliances to ensure long-term stability of the control. Each receiver can store approximately 20 transmitters. And one transmitter can also control several receivers (the transmitter must be matched to the receiver). Quality assuranceHigh quality relays can be used more than 100,000 times, making this product more stable and reliable. The high power terminal can withstand a current of 30A, so this product can work well even when the current is unstable. The receiver is suitable for 85V~240V, which makes it more flexible to use Wide range of applications The product can be used in homes, farms, factories, offices, laboratories, supermarkets, etc. You can remotely operate every device connected to the relay receiver via remote control. Such as lights, pumps, wireless security alarms, fans, lamps, ventilation equipment, monitors, printers, fountains and other electrical equipment etc. The system security chip code is the EV1527 learning code, which is the most popular technology and makes the remote control system more stable. The powerful signal reception receiver has an antenna on it so you can stretch it yourself for stronger signal reception. The remote control distance can be up to 50 metres. More flexibilityConfiguration and resetting is extremely easy. You can easily add additional wireless switches yourself to suit your needs.