1. Bluetooth App Control & Multi-Mode Adjustable Works with iOS 7.0+/Android 4.3+. 4 modes (Flash/Fade/Strobe/Smooth), music sync, timing, and adjustable dynamic speed. 2 simple steps: Scan QR code to download app → Connect via Bluetooth, ready to use 2. 12V Universal Fit for Multiple Vehicles Suitable for 12V trucks, SUVs, RVs, pickups, ATVs, etc. Ideal for wheel rims, under-vehicle, interior, or off-road lighting. Requirements: Wheel diameter ≥21", brake rotor ≤15.5" (confirm wiring compatibility before purchase) 3. IP68 Waterproof & Durable Material Aluminum alloy + PC silicone. IP68 waterproof/dustproof/rustproof/shockproof, withstands -40℃~85℃. High-brightness LEDs with 50,000+ hour lifespan, reliable in harsh conditions 4. Plug & Play, Easy Installation No wiring modification needed. Remove original wheels, insert lights into hubs, and reinstall. All parts included; professional installation recommended for best results 5. Safe & Stable, Great Value 12V safe voltage, compliant with vehicle electrical standards. Energy-efficient LEDs with uniform brightness. Sturdy material resists impact, ensuring long-term use These LED wheel rings are designed to enhance the appearance of your vehicle with vibrant, customizable lighting around the wheel wells. The rings mount securely to the brake rotor dust shield and are compatible with brake rotors ranging from 12.5 inches to 17.5 inches in diameter. Constructed for durability and performance, each ring features a high-quality LED array with an IP68 waterproof rating, ensuring reliable operation in rain, snow, and off-road conditions. The lights operate on standard 12V DC automotive power and can withstand high-temperature environments near braking systems. The set includes four illuminated LED rings, twelve aluminum mounting brackets, all necessary hardware (bolts, nuts, washers, and screws), a rocker switch, and a 5-meter wiring harness for convenient installation. Connection is straightforward: link the positive wire to the ACC power source and the negative wire to a ground point. No additional fuse is required for standard operation. Lighting effects can be controlled via Bluetooth using the “LED LAMP” mobile application, which is available for download on the Apple App Store and Google Play Store. Simply search for “LED LAMP” in your device’s app store to access color, brightness, and mode customization options. This product is backed by a one-year limited warranty for added peace of mind