We look for how isolated the volume controls are. In other terms, when your fingers try to find the buttons, how many do they find? If it’s two, that’s simple. A few is similar, just with a play/pause button in the center. But more than that, we have to https://www.bluetoothspeaker.top/high-power-loud-big-bluetooth-megaphone-bullhorn-rechargeable-battery-portable-speaker/