The rechargeable batteries will Offer you around twenty five hrs of play time per juice-up. You may also us your Marshall to reply, decline, and conclusion calls. Lame. Not your fault though, they put the "Phone" button correct on there close to the speaker's bass and treble adjustment knobs. https://www.bluetoothspeaker.top/ip67-outdoor-portable-speaker-pool-party-waterproof-bluetooth-speaker/