The iTech MusicClip 9100 is a Hi-Res, portable DAC (digital-to-analog converter) and Bluetooth headphone amplifier. It can upscale the Bluetooth signal to 32-bit / 384kHz. The detailed, dynamic sound comes from the aptX Bluetooth connection and the Hi-Fi Acoustic Booster function. The package also includes the ProStereo L1 Lite headphones.