The 2pc Wireless SMD LED Trailer Light Set is a wireless magnetic light cluster set ideal for trailers up to 20m long. This makes them ideal for metal trailers and agricultural vehicles where the limitations of wired lighting solutions cause difficulty in correctly illuminating your trailer.Wireless lighting solutionMagnetic mountingE32 compliantDesigned and manufactured for trailers, lorries, agricultural machinery, tractors, and other vehicles with EU plug wiring configurations and 7-pin plugs. The wireless transmitter only works with 7-pin plugs and enables the 5 function lights to illuminate in the same fashion as a standard wired setup. each light features brake, indicator, rear, and number plate illumination lights and both clusters feature reflectors. The dual USB charging cable supplied allows both lights to be charged simultaneously and the whole set comes packaged neatly in a durable storage case.