Because the control buttons are white over a black field, 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 just a little under seventeen hours. The Sony Ult Industry 7 wins the title for https://www.bluetoothspeaker.top/top-sale-portable-waterproof-wireless-speaker-outdoor-stereo-bluetooth-speaker/