Great Design433MHz 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 UseExtremely 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 shipment, and they are all configured in toggle mode. More FlexibilityThis 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).