The rechargeable batteries will Provide you with around 25 several hours of play time for each juice-up. You may as well us your Marshall to reply, decline, and conclusion calls. Lame. Not your fault although, they set the "Phone" button appropriate on there next to the speaker's bass and https://www.bluetoothspeaker.top/high-power-bt-speaker-wireless-stereo-subwoofer-music-player-outdoor-bluetooth-speaker/