The speaker works by using CSR 4.0 Bluetooth for high quality music streaming and you will connect the speaker to your smartphone or tablet devices. The speaker arrives with a built-in rechargeable 3600mAh battery and charges by using the micro USB port. The speaker also arrive with a built-in https://www.bluetoothspeaker.top/professional-audio-sound-system-subwoofer-heavy-subwoofer-speaker-for-party/