Mobile headphone bass amp with D/A converter that functions first as an awesome bass headphone amplifier with 2-band EQ (+/- 18 dB @ 60 Hz and +/- 18 dB @ 5 kHz) set for optimization of all kinds of bass instruments- its power output of 200 mW contributes to a more exhilarating listening experience with increased resolution and dynamics. It also functions as a recording tool both in digital and analogue. As an Analog Digital Converter, it features the finest BURR BROWN digital components (USB out is 48 kHz-16-bit digital conversion). Amp also provides up to 12 dB of gain and better than 96 dB signal to noise ratio - just use the headphone out jack to feed an amp or mixer. Amp is equipped with an internal lithium-ion rechargeable battery that is fed by its USB jack, so any computer or appropriate cell phone charger can charge it in less than 3 hours, but it can play for up to 8 hours. Dimensions: 65 x 135 x 25 mm. Weight: 240 g.