Upgraded LED: Each light is composed of 12PCS upgrade high-quality 3030 SMD LED chips, features wider lighting angle, and better heat dissipation. Output 3 time brighter light than others. High brightness for Reverse/Back Up light, low brightness for Tail light | Easy Installation: First, successively install the rubber grommet, round taillight with 3-prong plug onto the bracket. Then align the bracket hole with the hole on vehicle, screw goes through the hole, and then tighten the nut. Last connect the 3 wires to the corresponding wires on vehicles. Round hole diameter is 0.39” | Upgraded Unique Design: Upgrade notches on the inside of grommet, three bulges are added to create a tighter attaching ability between the grommet and taillight. These help the taillight not fall out, and can be firmly fixed on the mounting bracket with grommet. 3-prong plug also attaches tightly on the light. Shake proof, there will be no worries of loosing light or wires | Durable For Weather: The round taillight is highly silicone sealed, IP67 waterproof rating, always be ready for different kinds of weather attack. The mounting bracket is a durable metal coated with high-quality black powder. It is not easy to lose paint and rust | Extensive Application: Universal fit for DC 12V system, function as reverse/back up light and tail light for all kinds of trucks, trailers, tractors, semi-trailer, horse trailer, travel trailer, dump truck, Boat, special vehicle, etc. Just make sure the hole size before you purchase