Excellent Design433Mhz RF wireless remote control switch. The performance is stable and reliable, and the receiving sensitivity is high (>97dbm). The signal is strong and can pass through walls, floors, and doors. It can be controlled without obstacles within a distance of 50 meters. Easy to UseVery easy to set up and reset. There are 3 working modes (instantaneous/switching/latching mode) to choose from. You can easily set it up yourself according to your needs. The operating mode of the product is adjustable. These products are tested before leaving the factory and are set to switching mode. More FlexibilityThe receiver contains 2 relays, each relay has 3 terminals (Normally Open, Common, Normally Closed). The 2 relays are independent so you can remotely control them independently by pressing the remote button. Each receiver can store approximately 20 transmitters. And one transmitter can also control multiple receivers (the transmitter needs to match the receiver). [Quality Assurance] High-quality relays can be used more than 100,000 times. Make this product more durable and stable to use. The blue high-power terminal can withstand 10A current, giving this product good stability. It works even if the current is unstable. Wide ApplicationThe products can be used in homes, farms, factories, offices, laboratories, supermarkets, etc. You can remotely operate every device connected to the repeater receiver via the remote control. Such as garage doors, electric doors, rolling shutter doors, retractable doors and electric curtains, fans, lamps, lighting, ventilation devices, signal transmission, etc.