This is Tech 21's take on the Mesa-in-a-box tone. It's superb: heaps of gain from a bunch of cascading gain stages, very tweakable EQ, big tight low end with heaps of punch, complex harmonics and richness... perfect to tune down to drop C and do some chuggs and squeals. 

Model: Tech 21 Character Series California
Made in: NYC USA, recent model (serial 517385)
Type: overdrive/amp modelling
Power: standard 9v negative DC supply or 9v battery, not included
Equivalent new street price (approx): n/a
Mods: none
Accessories: no box or manual
Condition notes: no major marks, very good condition