This is an AMR DP-777 DAC in excellent condition with no issue or repair and with very light use. It uses tubes for amplification, and provides a palpable, 3-dimensional soundstage. The DAC has its own excellent volume control so there is no need for a preamp and USB digital input for computer music lover. It comes with the original shipping cartons, owner manual, ac power cord and a remote control. This DAC works perfectly with no issue. The small glass tube cover have a few small scratches due to cleaning and do not see them when the DAC is in my equipment rack. No Smoking and Pet. Accept cashier check, paypal (add 3%), and cash for local buyer. Let me know if any question - seven 0 three, seven 9 five, four three two eight.