Physical
Display: 1.7 inch (43 mm) diagonal, 262K Colors, 160x128 pixel resolution (Audiophilleo1)
Dimensions: 3 x 2 x 0.75 in (76 x 51 x 19 mm)
Weight: ~ 4 oz (113 g)
Space required: 15cm of space is required behind the DAC BNC/RCA tip. Right angle adapters can be used to reduce this space.
Sample rates

24 bits at 44.1, 48, 88.2, 96, 176.4, and 192 kHz. 16 bits at 44 and 48 kHz is also supported for iPad compatibility. Note that to the DAC, 24 and 16 bit S/PDIF data look the same, so it does not matter whether you play a 16 bit audio file in 24 or 16 bit mode.
Attenuation and balance (Audiophilleo1 only)
Type: Dithered volume control with noise shaping
Balance: Left or right channel may be attenuated up to 10 dB for adjusting channel balance
Max Level: 0dB
Min Level: -72dB
Steps: 0.5 dB from 0 dB to -20 dB and 1.0 dB from -20 dB to -72 dB
Accuracy: +/- .05 dB
Electrical
SPDIF output: 75 Ohm female BNC, +/- 300 mV amplitude, minimal overshoot, galvanically isolated
Edge transitions: < 700 ps (Audiophilleo1 has programmable rise-times up to 15 ns)
USB bus power: < 400 mA, 6V max
USB cable length: Up to 15 ft/5 m. Active USB extenders may be to 50 ft/15 m