1.[Distraction-free driving] Encourage the use of the assistant to make calls, send text messages, or get driving directions while driving. We also allow you to connect 2 phones at the same time, easily switch between music and calls! 2. Easy to use: Simply clip this car Bluetooth speaker on the sun visor and use it as a desktop speakerphone on the conference table or a portable music player outdoors. It's a great gift for friends, parents, and loved ones who own old cars or trucks. 3. Clear and loud sound: With noise reduction and echo cancellation technology, it brings you a clear call experience. Long press the button +/- to increase or decrease the volume. Tips: When on a call, keep your phone away from the Bluetooth car speaker 4.[Excellent sound quality] The Bluetooth speaker provides loud and clear sound, ensuring that every note is clear and pleasant. The built-in microphone allows you to make calls and voice control