Non-oversampling (NOS) DAC handcrafted by Scott Nixon. I first bought the Chibi DAC, and then upgraded by adding the outboard 3XDC regulated PSU, which improved just about everything, especially the dynamics. No OBM, but I have an electronic copy of the manual. In great condition, except for a tiny nick on the lower edge of the PSU. This unit accepts only 44.1/48KHz, 16bit input. Asking price includes FedEx ground shipping to continental US.