The rechargeable batteries will Offer you around 25 several hours of play time for every juice-up. You can even us your Marshall to reply, decline, and conclusion calls. Lame. Not your fault although, they put the "Phone" button right on there close to the speaker's bass and treble adjustment https://www.bluetoothspeaker.top/ip67-waterproof-speaker-rgb-led-light-wireless-bluetooth-speaker/