SMSL Audio SILVER SAP-VI headphone amplifier Specifications: Input/output interface: standard 3.5 mm Input frequency:96 KHZ / 16/24 bit Signal-to-noise ratio: > = 92 db (A weighting) Distortion: < 0.01 (10 mw) Frequency response:10-70 KHZ (0.3 db) Output power:32 ohm Po = 200 mw 1 KHZ THD + N 1% Headset adapter impedance:16 ohm - 300 ohm Machine size:188 X 73 X 25 mm (including bulge)