The rechargeable batteries will give you around twenty five hours of play time for each juice-up. You may also us your Marshall to reply, decline, and stop calls. Lame. Not your fault even though, they put the "Phone" button correct on there next to the speaker's bass and treble https://www.bluetoothspeaker.top/new-product-multifunction-led-wireless-bt-speaker-inalambrico-wireless-speaker/