This is a TOPPING D10s USB DAC. It has coaxial and optical outputs, making it convenient for connecting to external DACs or older amplifiers. The front display sheet has not been peeled off, so it is in a clean condition. Operation has been confirmed. Accessories: - Main unit, in excellent condition - Genuine USB cable (A to B) - Original box and instruction manual The feet have been replaced with FX-Audio PGN2 silicone feet. I am selling it because I recently switched to a stationary headphone amplifier.