Fast Heat Dissipation: The bulb is made of aviation-grade high-quality metal heat dissipation material, which doubles the heat dissipation and makes the performance more stable. It quickly cools down the heat of the LED and maintains stable work lighting status, making your travel safer. Bright Light: This LED bulb uses 15 2835LED SMD lamp beads, which are arranged in an orderly manner on the PC circuit board. There are no black spots or shadow areas. It is bright but not dazzling, comfortable for human eyes, and will not cause glare. A great option to upgrade your backup light. Stable Drive: This light bulb is driven by smart IC, equipped with a rectifier, constant current circuit design, quickly integrated into the original car circuit, no radio interference, more stable, more efficient and more powerful. Waterproof Design: This bulb has IP67 waterproof technology, which is suitable for various harsh environments. It is waterproof, moisture-proof, and fog-proof, so it can achieve super penetration even in low-visibility road conditions, allowing surrounding vehicles to see eye-catching lights status. Package Contents: You will receive 4 x T15 LED bulb, which can be used as reversing light, turn signal, brake light, suitable for W16W, 921,912, T15, 906, 904, 902, 922, etc. 1:1 design with original halogen lamps, easy to install, plug and play, no need to change the wiring, providing you with a worry-free installation experience.