Featured functions: used as led marker light at front rear side roof top or led clearance light indicator light on any 24v pickups truck trailers suv RV caravan boat lorry bus etc. upgraded leds: use 3 quality piranha led, featuring better heat dissipation, lighting angel, higher light intensity, and longer , make the light super and outputs excellent red light. awesome reflector design: the marker light employs a micro-reflex faceted reflector design, increasing the light output and adding on an exquisite appearance. highly sealed: lens and housing are sonically welded as a whole unit, inside leds are also -sealed. for all weather abuse. simple installation: black wire for ground, red wire for positive. just fix the black base with the 2 flat head screws provided, and then snap the light into the base. to run through the back wire lead, you can either drill a center hole , or use some washers when fixing the base, so you can get space to run the wire lead without drilling center hole. Name: Side Marker Lights Working Voltage: 24V DC LED Type: 3PCS Piranha LED for each light Light Color: amber Back Wire Lead length: 9 inches Applicable models: For truck trailer Material: plastic colour: orange Package Contents: 4 pair side marker lights( 8 pieces) Only the above package content, other products are not included. Note: Light reflection 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.