The rechargeable batteries will give you around 25 several hours of play time per juice-up. You may also us your Marshall to reply, decline, and stop calls. Lame. Not your fault though, they place the "Phone" button proper on there next to the speaker's bass and treble adjustment knobs. https://www.bluetoothspeaker.top/usb-bluetooth-speaker-with-hd-sound-usb-wireless-stereo-bass-speaker/