【Multi functions】Triple lighting brightness functions, 16 LED Red outer circles for tail lights(low brightness), brake lights(high brightness), and 7 LED inner circles for reverse | 【Brightness & Safety】Each light uses 23PCS quality LEDs to output excellent bright light. Also, adopt a specially designed polycarbonate lens to reflect direct light, and ensure better visibility and safety at night | 【Ready For The Weather】 360° edge full coverage of rubber, not easy to fall off, protect taillights, completely sealed outlet, eliminating all possibility of moisture, IP67 waterproof rating, always be ready for different kinds of weather attack | 【Easy to Wire & Install】Just mount the grommet firstly on the pre-cut or existing holes(comes with a paper template for you to drill holes), pop in the marker lights, and then connect to power to make it work, black wire- ground, red wire- brake light, yellow wire- reverse light, white wire- running light | 【Wide Application】Work on 12V DC system, functioning as Brake, Running, Reverse light, and tail light for all kinds of trucks, trailers, tractors, semi-trailers, horse trailers, travel trailers, dump Truck, etc