This wireless speaker boasts high-definition Bluetooth® 5.0 technology, allowing you to pair it with your device for dynamic stereo sound. Use the push buttons to turn it on or off and select mode settings to switch between Bluetooth®, FM, Aux In, TF, or USB Disc. Adjust the volume with the turn knobs. It features an FM radio (87.5 MHz-108.0 MHz) and supports TransFlash card play. For USB play, plug a USB disc into the port, and for Aux mode, Use 3.5mm Plug Audio Cable (Not Included) Into Aux Port To Connect The Speaker And Your Phone. The speaker includes a handle for easy carrying, LED indicator lights, and a 3.7V/400 mAh battery with a 5W output. It charges fully in 2.5 hours, pairs from up to 33 feet away, and plays for up to 1 hour at maximum volume on a full charge.