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,dome light,day flower lamp,fluorescent lamp,energy-saving ,,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: DC12-72Vsize: 54 x 84 x 28mm:Plastic + Metalcolour:black+whitePackage Contents:1 x Switch1 x Antenna2 x remote controlsOnly the above package content,other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.