Calyx Kong USB DAC Headphone Amp If you are amazed by the sleek look of the aluminum chassis, just wait until you hear this little beauty. Transform your PC/MAC sounds with this easy to use, plug'n'play DAC/headphone amplifier. Output to your favorite headphones and use the volume up/down/mute to control levels. Also can be used as a preamp to active speakers or a small power amp using the 3.5mm stereo output jack. USB cable is included. Functions USB DAC Volume Control Preamp for Active Speakers 3.5mm stereo output Specifications THD+N < 0.01%, 1kHz, >10kΩ THD+N < 0.02%, 1kHz, 32Ω SNR -98dB @ 1kHz, 32Ω Channel Separation -70dB @ 1kHz, 32Ω Dynamic Range 98dB, 32Ω Bandwidth limit = 140kHz @ -3dB, 32Ω Volume Control = 0 ~ -64dB Dimension Net Dimension : 52mm X 86mm X 22mm (Width X Depth X Height) Net Weight : 167g