1[7 Functions] This product is a real steering wheel controller, equipped with 7 customizable functions of the steering wheel controller. 2[Provides Convenience] Convenient for you to control multimedia or answer phone calls through the steering wheel while driving. 3[High Quality] 100% brand new high quality products, through strict product quality control before to ensure product quality. 4[Black Design] This steering wheel controller adopts a clock shaped round black design, which can be perfectly matched in all color models. 5[Wide Application] This smart wireless steering controller has a wide range of application, which can be used for most types of cars. Item Type: Steering Wheel Control Material: ABS.Color:Black Battery Model:CR2025 Battery Capacity:150mAh Rated Battery Voltage: 3V Functions: One Key Switching of Multimedia Playback, BT Answering/hanging Up Calls, Multimedia Volume Adjustment, Voice Function, Etc. Applicable Models: Universal Purpose 1 xSteeringWheelControl 1 xStorageBox 1 x User Manual 1. Before purchasing, please confirm whether your host supports the steering wheel control function. (Conditions are available: 1 The navigation unit's setting interface has steering wheel learning or steering wheel setting functions. 2 The navigation unit tail line has a controller line. Viewing method: the navigation unit case sticker has a controller line on the upside, and the navigation unit tail line label can Find the corresponding controller line label, usually sign controller 1 controller 2 controller A controller 0 controller grounding, etc.)2. This product is a universal steering wheel controller, compatible with most rearmounted car navigation hosts (original CD, please do not purchase the original host). But we do not guarantee that the buttons of this product are 100% matched If there are 1~2 keys that do not match, it is normal. If you cannot accept the above description, please do not buy.3. The product only supports the host side control signal voltage of 3.3V~5V4.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.