The Universal 7-Key Car Wireless Steering Wheel Remote Control Knob is a versatile and stylish accessory for car owners. Made of high-quality ABS+PC material, it is durable and long-lasting. With built-in replaceable button battery, it supports customizable 7-Key function and background light. It is compatible with various functions such as volume control, mode selection, Bluetooth phone operation, and track navigation. Enhance your driving experience and effortlessly control your car's Android DVD/GPS navigation player with this convenient and user-friendly wireless remote control knob. Features: - Built-in replaceable button battery. - Support 7-Key function customize and background light. - Support all function such as(Vol+/-,Mode,Bluetooth phone,Pre/Next etc.) Specifications: Material: ABS+PC Size: Diameter 46mm*12mm Package Included: 1 X Remote Control 1 X Signal Receiver 1 X User Manual Notes: 1. Manual measuring, please allow 1 ~ 3mm error, thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.