Wireless Car Steering Wheel Control button for Car Radio DVD GPS Features: - Easy installation and removal. (1) Four tyles of difference button switches,named "style 1 "and "style 2 "and "style 3 "and "style 4" (2) Style 1 :Support 5-Key function customize and background light Style 2 :Support 7-Key function customize and background light Style 3 :Support 8-Key function customize and background light Style 4 :Support 10-Key function customize and background light New design resin strap for mounting,you can mount it anywhere (3)New upgrade button surface design,more smooth touch feeling (4) It's not steering wheel remote controller,it's ture car steering wheel control key button for your stereo. (5)Please confirm your car stereo supports "Steering Wheel Control" function. (6)Integrated arc design, perfect compatible with a variety of car steering wheel, does not affect the steering wheel cover. (7)Being flexibly installed along the steering wheel as you like, this controller is easy to use and helpful to keep safety for your driving. Style 1 Specification : 1. Support Various Android / Wince Car Multimedia Player 2. Mute , Volume , and Next/up program ( Music, video, Radio,bluetooth ... ) 3. M3 Sticker / 4pcs Scews fixed on car steering wheel 4. 1M 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 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. Style 2 1. Support Various Android / Wince Car Multimedia Player 2. Mute , Volume , and Next/up program ( Music, video, Radio,bluetooth ... ) 3. M3 Sticker / 4pcs Scews fixed on car steering wheel 4. 1M 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 Style 3 Material: ABS+PC Color: Black Shape: Round Quantity Of Button: 8 buttons Steering Wheel Control Size: 5.5x7.5cm/2.2x3inch Button Function Include: Prev Song, Next Song, Vol-/Vol+, Play/Pause,Answer the phone,Hang up the phone. Operating Temp: -20~85 Style 4 Specifications: - Product Width Dimmession : 3.5CM ; Height/Thickness : 0.80CM - Material: ABS, PE - Power: 1W - Voltage: 3-5V - SNR: 96dB - Transmission distance: about 5m - Battery: 2pcs CR2025 button cell (included, normally ,it could work for 2-3 years ) - with Blue light on buttons ( click the physical button, the button light will be on for 2-3 seconds ) Package list : 2 x Controller Key 1 x Receiver Box 1x User Manual 2 x Strong Sticker 2 x Rubber bracket