Compact, high-quality 32-bit D/A converter that is the perfect DAC for computer audio and features an integrated headphone amplifier exclusively designed to get the most from and PC audio setup. It is compatible with Windows XP (SP2 or later, not compliant to XP 64-bit)/Vista/7/8/8.1/10 and Mac OS X (10.6 or later), and works with up to 24-bit/96 kHz audio source. The unit is powered by USB bus power and exclusive PLL power supply is built in to reproduce the stable electrical supply. It is also equipped with high quality analog headphone amp to drive any type of headphones and a high-grade AKM 32-bit DAC AK4390. Its condensers and OP amp are designed exclusively for audio products. The converted provides a USB/Digital (Optical) input selector and headphones/RCA (Analog) output selector, and doubles as a D/D converter from USB digital audio to Optical. Any USB/AC adapter from the shelf can be used for use as an Optical/Analog converter. Four rubber feet and a 1m long USB cable are included. Dimensions: 108 x 36 x 140 mm. Weight: 450 g.