I had no hiccups playing things from my phone for the speaker, with volume control available possibly through long-pressing the backward and forward buttons to the speaker or through the volume rockers on my phone. Luckily for us, some manufacturers also list the anticipated several hours of battery life https://www.bluetoothspeaker.top/top-sell-mini-wireless-bluetooth-speaker-portable-outdoor-bluetooth-speaker-with-rgb-light/