The rechargeable batteries will Provide you with around 25 hours of play time for every juice-up. It's also possible to us your Marshall to answer, decline, and conclusion calls. Lame. Not your fault however, they set the "Phone" button ideal on there close to the speaker's bass and treble https://www.bluetoothspeaker.top/bluetooth-speaker-china-tws-multimedia-wireless-party-box-sound-load-bluetooth/