PockRock effects processor. This is really great for travel (takes 2xAAA) or as a headphone amp. Small and light enough that you can easily strap-mount it. Delay, reverb, chorus, flange, OD, distortion, fuzz, and even a type of amp simulation, plus a tuner and drum patterns to play along to. Comes with manual and power supply. The box is a bit squished, and I did get it out to check it worked but otherwise it's mint condition.
eBay