The speaker works by using CSR four.0 Bluetooth for high quality music streaming and you will connect the speaker to your smartphone or tablet devices. The speaker comes with a built-in rechargeable 3600mAh battery and charges by way of the micro USB port. The speaker also arrive with a https://www.bluetoothspeaker.top/bluetooth-retro-speaker-karaoke-bluetooth-speaker-audio-wireless-sound-card-bass-speaker/