Universal Wireless Steering Wheel Control Upgrade your driving experience with this wireless multi-function steering wheel control, specially designed for Android car radio, DVD, GPS and multimedia systems. It is compatible with most 2 Din universal head units, helping you control your in-car audio and navigation safely and conveniently. Support Various Android / Wince Car Multimedia Player With Steering wheel Control Function Key controllers - GPS, Phone off/on, Mute , Volume + - , Mode , and Last/Next program ( Music, video, Radio,bluetooth,GPS ... ) Safer and More Convenient Driving By operating your car radio, DVD and GPS functions directly from the steering wheel, you can keep your eyes on the road and hands on the wheel, improving driving safety. It helps minimize distractions while adjusting music, volume or navigation. Wide Compatibility Suitable for a wide range of Android car radios, DVD players, GPS navigation units and multimedia systems. The universal design makes it an ideal replacement or upgrade for many 2 Din car entertainment systems, reducing the need for multiple remote controls. Specifications: Power: 1W Voltage: 3-5V SNR: 96dB Transmission distance: about 5m with Red light on buttons ( click the physical button, the button light will be on for 2-3 seconds ) Attention for pre-order: * The product could not work with any tablet PC , Home TV , or car headrest , roof mount monitor ... * if your car radio player has key 1 wire , no key 2 wire , , Please do not buy , our product could not work with the car radio completely . * the product can work with android car radio player , or wince car radio player with key 1 ,and key 2 wires . Knowledges for installation: * before installation , please switch off your car power ,and avoid to burn the electronics boardwhen making wrong wire connection * please make the wire connection according to wire diagram ( see the below wire diagram ) * after wire connection , please enter in the menu interface of s