Sold my DAC so no longer use the Z-Systems. Features:Real-time sample rate conversion. Supports up to 24 bits at 96 kHz. Low jitter internal references. Applications: Mastering, DAT to CD transfer, Format conversion and Wordlength reduction. AES/EBU, coaxial S/PDIF and optical inputs and outputs. 24, 20 and 16 bit output modes via TPDF dither. Handles input and outputs at up to 24 bits between 32kHz and 96 kHz. Unit is in great shape and performs beautifully. Case is black. Comes with separate power cord. USA and Paypal only please. Do not have original box or manual, but I will include the tear sheet.