ESI Dr. DAC Prime, A/D D/A converter - USB audio interface, headphone amplifier, max. 24bit/192khz S/PDIF input/Output: coaxial & optical combo receiver module, 24bit/192kHz upsampled S/PDIF output (optical & coaxial), 2 3.5mm mini plug-toslink optical adpters bundled, TI SRC4382 high-end combo sample rate converter: 32kHz ~ 192kHz input support, S/PDIF & USB input bypass, 192kHz upsampling support with SRC4382, +-1ppm 24.576MHz TCXO for S/PDIF input, Tenor TE7022L USB audio controller, Asio 2.0 driver, 2 channel line input/output with RCA connectors, stereo headphone output, incl. 12V / 1.5A DC adapter included