USB 2.0 connection to Mac and PC Up to 24 bit / 192kHz audio ESS Sabre DAC Enhances your iTunes, Pandora, Spotify, Tidal or other music listening experience Constant Current Drive™ provides smooth frequency response with any headphones Quad Sum DAC™, 4 DACs per channel for highest dynamic range and lowest distortion Asynchronous clocking Multi-color LEDs for status and level indication Powered by USB Top panel buttons for adjusting volume level Compact and portable (95mm L x 30mm W x 16mm H) Premium aluminum build quality Built in the USA