This is a media control button that allows you to play or pause music, up and down songs, and increase or decrease multimedia volume. Features: 1. No need to touch the smartphone/tablet. With this wireless media button, you can control music, take pictures and wake up the smart assistant with one key. 2. There is a base, which is convenient to fix on the steering wheel. 3. Use the attached base to connect the media button to the handlebar of the bicycle, keeping your sight on the road, and placing your hand on the handlebar. 4. If you don't touch the button for about the 30s, it will automatically enter sleep mode. 5. Easy to use, small, and compact, with a wireless range of up to 10 meters. Specifications: Size: Diameter: 36mm, Thickness: 8mm Battery model: CR2025 Compatibility: iOS7.0 or for Android4.4+ Wireless range: 10 meters Sleep mode: 30s Package Includes: 1 * Mobile phone remote control 1 * Manual 1 * Tape Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. monitorings are not calibrated the same, the item color displayed in photos may be showing slightly different from the real object.