Since the control buttons are white over a black area, they’re simple to see even in dim light. Connie Park/NYT Wirecutter When you have a design organized, you’ll be able to add it and preview your personalized Bluetooth® speaker during the design studio in advance of positioning you purchase. https://www.bluetoothspeaker.top/wireless-bluetooth-speaker-fm-tf-card-u-disk-audio-subwoofer-wireless-speakers/