NIB XDUOO TA-01B HiFi Audio High Performance USB DAC Tube Headphone Amplifier.

Specs:

• Supports sampling rates: 16–32 bit / 44.1–192 kHz, DSD 64–128

• Output power: 2,100 mW (32-ohm load)

• Frequency response: 10 Hz–100 kHz (+/- 0.5 dB)

• THD + N: 0.03% (1 kHz)

• Signal-to-noise ratio: 110 dB

• Suitable headphone impedance: 16–600 ohms

• Gain: + 17 dB

• Power supply: DC12V/2A

• Compatible systems: Windows XP and 2000 / Windows 7, 8, and 10 (driver required), plus Mac OS X system (no driver required)

• Dimensions: 5.5 x 3.1 x 3.2 in (140 x 80 x 82 mm)

• Weight: 14.4 oz (410 g)