Features: This Bluetooth Media Button allows you to control music at your fingertips with a single press when your smart phone / tablet is out of your reach. It's a media control button that allows you to play or pause music, skip back or forward a song, increase or decrease the volume of your media. Use the included mount to attach the Media Button to your steering wheel or onto bicycle handlebars, allowing you to keep your eyes on the road and your hands on the wheel. Convenient to use, small and compact, you could freely take it anywhere you go.CR2025 battery is projected to last at least 1 year. Spcification: Type: Bluetooth Media Button Material: ABS colour: black Package Contents: 1 x Car bluetooth multifunction button(Built-in 3.3v button battery) 1 x Car USB AUX Receiver 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.