The rechargeable batteries will Supply you with around twenty five hours of play time for every juice-up. You may also us your Marshall to answer, decline, and close calls. Lame. Not your fault while, they set the "Phone" button correct on there close to the speaker's bass and treble https://www.bluetoothspeaker.top/soundcore-bluetooth-speaker-with-hi-res-audio-ipx7-waterproof-for-indoor/