The rechargeable batteries will Present you with around 25 hours of play time per juice-up. You can even us your Marshall to answer, decline, and close calls. Lame. Not your fault while, they put the "Phone" button correct on there close to the speaker's bass and treble adjustment knobs. https://www.bluetoothspeaker.top/professional-wireless-bass-portable-dj-party-smart-gaming-bluetooth-speaker/