The rechargeable batteries will Provide you around twenty five hours of play time for each juice-up. You may as well us your Marshall to answer, decline, and conclude calls. Lame. Not your fault nevertheless, they set the "Phone" button suitable on there next to the speaker's bass and treble https://www.bluetoothspeaker.top/bluetooth-speaker-hifi-heavy-bass-wireless-soundbar-subwoof-loudspeaker-supports-aux-tf-card-fm-radio/