Because the control buttons are white over a black subject, they’re very easy to see even in dim light. Connie Park/NYT Wirecutter For all twenty five speakers we tested, the average battery life was a little bit under 17 hrs. The Sony Ult Area 7 wins the title for https://www.bluetoothspeaker.top/new-arrival-bluetooth-speaker-with-led-waterproof-subwoofer-handsfree-wireless/