The rechargeable batteries will Provide you with around 25 several hours of play time per juice-up. You can also us your Marshall to reply, decline, and stop calls. Lame. Not your fault while, they set the "Phone" button ideal on there beside the speaker's bass and treble adjustment knobs. https://www.bluetoothspeaker.top/high-end-speaker-bluetooth-promotion-soundcore-bluetooth-speaker/