NAD D 1050 USB Digital to Analog Converter has a top-of-the-line headphone amplifier that delivers exceptional sound quality. This amplifier is perfect for music enthusiasts who want to experience high-quality audio at home. The digital processing of the D 1050 features Delta/Sigma architecture with active oversampling filters to reduce out of band noise while maintaining linear phase response. Analog outputs include both balanced and single-ended connections.

Comes in the original box. In the box there are:
- Amplifier
- The original power supply with the US plug
- USB-A to USB-B 2.0 Cable.

I've had this unit for several years. I have used the USB inputs (connected to a PC) and coaxial inputs (connected to a DVD player), and connected it to an external amplifier using the unbalanced (RCA) outputs.