The rechargeable batteries will Offer you around 25 hours of play time for each juice-up. You may also us your Marshall to reply, decline, and close calls. Lame. Not your fault nevertheless, they put the "Phone" button correct on there beside the speaker's bass and treble adjustment knobs. It https://www.bluetoothspeaker.top/rgb-bluetooth-5-0-speaker-with-stereo-sound-bass-support-tf-card-aux-waterproof-speaker/