The rechargeable batteries will Provide you with around 25 hrs of play time for every juice-up. You may as well us your Marshall to answer, decline, and end calls. Lame. Not your fault nevertheless, they put the "Phone" button ideal on there next to the speaker's bass and treble https://www.bluetoothspeaker.top/speaker-super-bass-led-light-wireless-inalambrico-music-speakers/