Excellent NOS DAC from Metrum Acoustics out of the Netherlands, Octave Mk II. This is the more desirable model with USB2. Watch out for the older model that has USB1. This newer model connects to my iMac USB without loading any special drivers - very neat and easy! Check out the Soundstage! review for a nice overview that matches my opinion of this fine DAC.
Original box included - manual comes on a disc which I never used.
Shipping is $22 in most US locations.