The rechargeable batteries will give you around twenty five several hours of play time per juice-up. You may as well us your Marshall to reply, decline, and finish calls. Lame. Not your fault while, they put the "Phone" button suitable on there next to the speaker's bass and treble https://www.bluetoothspeaker.top/led-wireless-bt-5-0-speaker-hifi-sound-mobile-phone-computer-speaker-music-player/