A versatile portable audio system that includes a 3.7V / 1500mAh rechargeable battery. It offers a TWS function that allows you to connect 2 units with the same Bluetooth pairing name to one Bluetooth source to get higher sound performance and stereo operation. LED illuminated bass speaker. The speaker has a built-in USB/microSD/MP3 player and includes an AUX input. The package includes a hand strap.