The relay adopts 40A relay, the maximum load is 30A, which can load high-power electrical appliances. Using radio frequency technology, it can pass through obstructed walls, floors and doors. With an external high gain antenna door, the maximum remote control range can reach 3000-5000M, meeting the needs of long-distance control. Perfect for remote controlling of droplight, crystal lamp, modern low-pressure lamp, absorb dome light, day flower lamp, fluorescent lamp, energy-saving lamps, exhaust fan, LED light etc. Fast and easy installation, not obstructed by walls, capable of connecting any loads. Remote controller and switch can be used simultaneously for ease and flexibility. Voltage: DC12-72V size: 54 x 84 x 28mm Material:Plastic + Metal colour:black+white Package Contents: 1 x Switch 1 x Antenna 2 x remote controls Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.