This is a used D6 headphone-amp & dac in excellent condition. I have moved on to a larger desktop system, and no longer get enough use out of this unit to justify keeping it. It comes with the original charger, leather case, and usb cable. Main Features: · Dual WM8740s High Performance D/A chip · TI TAS1020B USB receiver chip, handles up to 24Bit/96KHz USB digital signal OP+BUF structure for amplification · 2-Setting Gain Switch for impedance matching (+3/10dB) · Works as a combo or a stand-alone AMP, DAC, USB soundcard · Powered by 12.6V Li-polymer rechargeable battery pack, or USB power · 20 hours play time with stock OPAMPs · High output power, 650mW+650mW into 32Ω · Measures 55*24*92mm, weighs 150g Price includes shipping; USA only. Payment through PayPal. Feel free to PM me with questions.