Great design433Mhz RF wireless remote control switch. Stable and reliable performance with high receive sensitivity (>-105dBm). Radio frequency signal transmission. A strong signal can pass through walls, floors, doors, panels, etc. It can be controlled within 50 meters distance without obstacle.Easy to use: Extremely easy to set up and reset. There are 3 working modes (momentary/toggle/latching mode) that can be configured. You can easily configure yourself according to your demands. The working mode of the product is adjustable. This item has already been configured in toggle mode. It can also be configured in mix mode. Such as 2 channel momentary mode and 2 channel toggle mode. More Flexibility This receiver contains 4 relays, and there are 3 terminals (normally open, common, normally closed) for each relay. These 4 relays are independent, so you can control each of them independently. Each receiver can store approximately 20 transmitters. And one transmitter can control multiple receivers. For example, you can use two relays to control the door/garage motor and the other two to control the lights. more durable and more stable to use. The blue high-power terminal can withstand 15A current, so this product can have a good effect even when the current is unstable. The receiver is suitable for 85V~240V voltage, it is more flexible to use. Wide Application The products can be used in homes, farms, factories, offices, laboratories, supermarkets, etc You can remotely operate each device connected to the relay receiver via the remote control. such as, garage door, electric door, shutter door, expansion door and electric curtain, fan, lamp, lighting, ventilation device, signal transmission and so on. Note: The data is manual measurement, please allow 1-171cm error, due to differences between light and screen, there will be a certain color difference, the specific received in nature prevail.