Item Type: Steering Wheel Media Button Material: ABS Colour: Black Battery Model: CR2025 (Built-in Battery) Battery Capacity: 150mAh Rated Battery Voltage: 3V Functions: One-key switching of multimedia playback, Bluetooth answering/hanging up calls, multimedia volume adjustment, voice function, etc. Fitment: Universal Package List 2 x Steering Wheel Media Button 2 x Washer 1 x Charging Cable 2 x Sticker 1 x Steering Wheel Control Receiver Box 1Convenient Control: The steering wheel controller is equipped with 10 customizable functions, which is convenient for you to control multimedia through the steering wheel while driving. 2Multi Function: With function of one key switching of multimedia playback, Bluetooth answering/hanging up calls, multimedia volume adjustment, voice function, etc. 3Special Design: With a clock shaped round black design, it can be adapted to all color models, generous appearance. 4Reliable Quality: Strict product quality control before leaving the factory to ensure product quality. 5Long Lifespan: Exquisite and careful workmanship, can be used for a long time, saving your cost.