Our Wireless car speakerphone features advanced Wireless 4.1+EDR technology, noise canceling microphone, 3W powerful speaker unit and 1000mA rechargeable battery, which offer you an optimal solution for enjoying music or clear hands-free calls. Its inbuilt 1000mA rechargeable battery lasts up to 20 hours of talking time and 1400hour of standby time. It is an essential gadget for the car owners to ensure the self-driving travel more enjoyable and safe.