Yuer BA-10 Portable Bass Amp BT; bass combo with Bluetooth 5.1, transistor / solid-state design, 10 Watt RMS, 2x 1.75" speaker, built-in rechargeable 3.7V / 3000 mAh lithium battery, playback from external sound sources via Bluetooth or AUX input, runs up to 4 hours per battery charge, 2 selectable sound modes: Clean / Overdrive, controls for Bluetooth / Aux Volume, Gain, Tone, Volume, switches for Bluetooth On / Off, Clean / Drive, 6.3 mm mono jack instrument input, 3.5 mm stereo jack AUX input, 3.5 mm stereo jack headphone output, power supply via USB Type-C port, dimensions (W x H x D) 152 x 99 x 73 mm / 5.98" x 3.90" x 2.87", weight 590 g / 1.3 lbs, incl. USB Type A to USB Type C cable