[Great Design] 433MHz RF wireless remote control switch. Stable and reliable performance with high receiving sensitivity (>97dbm). Strong signal can pass through walls, floors, doors. It can be controlled within 50 meters without obstacle. [Easy to Use] Extremely easy to set up and reset. There are 3 working modes (Momentary/Toggle/Latched mode). You can easily set it up yourself according to your needs. The working mode of the product is adjustable. These products are tested before shipping, and they are all configured in toggle mode. [More Flexibility] This receiver contains 2 relays, and there are 3 terminals (normally open, common, normally closed) for each relay. These 2 relays are independent, so you can remotely control each of them independently by pressing the button on the remote 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 relay that can be used more than 100,000 times. Let this product last longer and be more stable to use. The high-power blue terminal can withstand 10A current, so this product can have a good effect even when the current is unstable. [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.