Usage Tips:1. Support Android / Wince Car Multimedia Player 2. Mute, Volume, and Next/up, phone answer and hang up program ( Music, video, Radio,bluetooth ...) 3. Sticker fixed on car steering wheel 4. Cable connect with SWC key cable of car multimedia player 5. Easy installation , after wires connection, enter the SWC interface of car multimedia player ,and study the wire connection Universal Steering wheel Controller Tips: 1. The product is not a portable remote controller , and can not work any tablet PC , Home TV , or car headrest , roof mount monitor ... . it just work the function as Car steering wheel control button. 2. The product can work with wince car radio , or android car radio . if your car radio has steering wheel control function , our product can work , and control the button for bluetooth , radio , music or video after study 3. If your car radio do not have steering wheel control function ,please do not buy , our product could not work. Knowledges for installation: 1. before installation , please switch off your car power ,and avoid to burn the electronics board when making wrong wire connection 2. White ground control wire, black ground wire 3. after wire connection , please enter in the menu interface of steering wheel control on car radio screen,and set up these soft buttons on learning , click the soft button on car radio screen ,and then the corresponding physical button on steering wheel control button . repeat to pair the buttons one by one. Colour:Black Material:ABS Package Contents: 1 * Car Steering Wheel Buttons Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.