This is Vertex's recreation of the Dumble Overdrive Special. There's a sweet touch-sensitivity, rich complex harmonics, super clear note separation... it sounds great. It's the earlier version with a few extra controls, so you can tweak away to your heart's content.

Model: Vertex Ultraphonix HRM
Made: USA, recent model
Serial: obscured
Type: overdrive, Dumble style
Power: standard 9v DC negative power supply (not included)
Equivalent new street price (approx): $319aud
Mods: velcro added
Accessories: original box and docs

Condition notes: used, no major marks. Tested and fully functional.
Overall: excellent condition (9/10)