This is one of the tastier and more natural sounding 'British stack in a box' pedals going around. There's some major flexibility on offer via the controls, so it goes from fairly sensible to all out madness. A cult favourite for a reason. 

Model: MI Effects Super Crunch Box
Made: Sydney, Australia
Type: low-mid gain boost/overdrive
Power: standard 9v supply or battery
Switching: buffered bypass
Draw: 20mA approx
Dimensions, excluding knobs/switches/jacks: 109x58x30mm 
Equivalent new street price (approx): $179aud
Mods: velcro attached
Accessories: no box or manual
Condition notes: used, few very minor marks, excellent condition

Controls
Vol (top left): output volume
Gain (top right): gain/crunch added
Pres (bottom left): adds or cuts some treble, around 2-3k
Tone (bottom right): darkens or brightens the overall tone
Toggle switch Lo/Hi: different gain modes, difference is substantial
Toggle switch Comp: compression added; either 0 in the middle or increased sustain and compression on 1 and crazy saturation on 2