Here we have a high end acoustic pre-amp designed to be small enough to attach to your strap. It's great on a steel string guitar, but also handy for banjos, mandolins, violins etc as it has a very flexible EQ. Despite the name, this is not pitched at Electronic Dance Music makers.

Model: Headway EDM-1 Sheer Acoustic Preamp/DI
Made: China, recent model
Serial: M1307093
Type: pre-amp/DI
Power: standard 9v DC negative power supply (not included)
Equivalent New Street Price (approx): $385aud
Mods: none
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: very good condition (8/10)