It's the half-rack size version of the iconic Quadraverb... heaps. of cool little reverbs and other goodies in a small box. The bigger reverbs on board are especially fun, they're huuuuuge.

Model: Alesis NanoVerb (v1)
Made: China, 1997 (serial NV4741060)
Type: reverb/multi-FX
Power: 9v AC supply (included)
Equivalent new street price (approx): n/a 
Mods: none
Accessories: no box or manual
Condition notes: used, few minor marks, fully functional. Overall: very good condition