The operation is very simple: the wires for LED trailer lights lead from the middle and not anywhere else, white for positive and black for negative, or black for positive and white for negative. Tighten the screws to complete the installation Suitable For a wide range of vehicles: These trailer marker lights (12V-24V universal) can be used as LED marker lights, side lights, tail lights, trailer lights for trucks, trailers, boat trailers, caravans and many other vehicles. High Quality Design: Our caravan trailer light adopts fully closed circuit design, waterproof and dustproof; thickened and sleek shell, 2835 wick, low power, high brightness, in addition, the lens is not easy to fade due to sunshine and rain, which brings you a wonderful using experience! Durable: one year warranty, each caravan signal light is made of high quality LED wick and plastic, not easy to be deformed and broken in long term use; these lights have smooth surface and comfortable to touch. Awesome Reflector Design: The marker light employs a micro-reflex faceted reflector design, increasing the light output and adding on an exquisite appearance. product_description： 1.LED pcs:2 2.LED type:2835 3.Application:sign light/side indicator/tail light 4. Colour temperature, light colour: 3000k, white light 5.Shell colour:white shell 6.Voltage:DC 12V - DC 24V universal voltage 8.Waterproof grade: IP67 9.Material: ABS+PC 10.Working temperature: -40℃~+80 11.Service life: >30000hs 12.Applicable models: car, lorry, truck trailer, caravan, boat 13.Light Mode: Normal light 14.Product size: 6.5cm*2.8cm*1.8cm (L*W*H)