The rechargeable batteries will Offer you around 25 hrs of play time for every juice-up. You can also us your Marshall to answer, decline, and conclude calls. Lame. Not your fault although, they place the "Phone" button appropriate on there close to the speaker's bass and treble adjustment knobs. https://www.bluetoothspeaker.top/indoor-party-led-light-stereo-speaker-bottle-deep-bass-rgb-colorful/