Partsam 4x Amber 3 LED Trailer Truck Boat Side Marker Light Lamp 12V Waterproof Partsam ( 4xAmber w/ Chrome Bezel) side Marker Light Lamp, waterproof Lens, sealed Light with 3 pcs high power LED inside. Works with any 12V vehicles, Best for Truck, RV, Trailer, horse trailer, travel trailer, travel trailer, Lorry, Pickup, et. Functions as clearance light, side marker, marker light or identification light. Two-wire design includes both lead wire and ground wire for mounting to all surfaces; Removable housing makes easy installation and FREE screws are included. Offering customer technical service, feel free contact us for technical, installation and use question.