Portable High-Resolution Audio Playback 2 x Burr-Brown DAC Chips Support for MP3, PCM, DSD & DXD 3.5mm Mini-TOSLINK/Coaxial & USB Inputs 4.4mm and 1/4" Headphone Outputs Stereo RCA Line Output 3D+ & XBass+ Sonic Enhancements AMR Femto-Precision Clock for Low Jitter Built-In Battery with 6 to 12 Hour Life Power Modes to Suit Most Headphones