Simple and fast operation Controlled by APP controller, with quick Bluetooth connection. Just need 2 steps following, you can easily operate it! 1,Scan the QR Code on the controller box to download the app (over Andriod 4.3 or IOS phone). 2,Open the phone Bluetooth of your phone, search the signal and connect, then you can use app control the lights Material The white ring light frame is made of solid aluminum alloy,and the durable PC silicon tube belt has IP68 waterproof grade. Assembly parts and easy to install. Great material and high Performance IP68 Waterproof/ Dustproof/ Rustproof/ Shockproof Aluminum alloy+PC High intensity LED chips Working voltage: 12V Operating Temperature: -40℃ to 85℃ Bluetooth App Available for: iOS 7.0 or Android 4.3 above Life Time: Over 50,000 hours Application White Wheel Rim Lights for Trucks,SUVs,RVs,4x4s,Pickups,Atvs, Van,Trailers,Tractors,Use Them Under Your Vehicle Or As Interior Light, Off-Roading Light, Reverse Light,Etc. Fit For: Perfectly fit for all 12V vehicles and devices : 1. Wheels diameter have to be 20 inch or larger 2. Brake rotors have to be 13.5 inch or smaller 3. MUST be make sure all the wiring size suitable for your car before ordering (Professinal installation are suggested!!!) Description: Control : Phone app Bluetooth control (Andriod/IOS available) APP Using : LED LAMP - Will be QR Cod in the controller box to scan, then down load the app on your phone Available Colors: Pure White Base strips color : White Double Row Strips Wheel Rings Diameter: 15.5" Fit for 13.5” Wheel Rotors Installing : Mounts to Brake Rotor Dust Shield Operating Voltage: 12V DC Vibrantly lights up Wheel Wells Fits around Brake Rotor Can withstand high heat temperatures Universal Fitment Mounting Hardware IP68 Waterproof Be sure to check the diameter of your brake rotor to ensure proper fitment. Or you could adjust the rings by professional workers or by yourself, they are adjustable from 12.5'-17.5". Please make sure the wheel lights suitable for your car rotors size, thank you. Advantages: . Pure White Color . LED strip light comes with 5 meters length wiring, perfectly fit with the car wheel hubs . Lighting color controlled via smartphone APP