Caroline Haymaker drive, made in USA. These are a handy boost/drive pedal with a lot of tonal options at your disposal. The switch changes the style from a mid-hump drive to a clean boost to a saturated stack type sound, and there's a lot of range in the tone and gain controls. Handy, well made and sure to get along nicely with your other pedals.
Model: Caroline Haymaker Dynamic Drive
Made: Colombia SC USA
Type: low-mid gain boost/overdrive
Power: standard 9v supply or battery
Equivalent new street price (approx): $289aud
Mods: velcro attached
Accessories: original box, no manual
Condition notes: few very minor marks, excellent condition
Here's a handy demo to give you the idea.