Based on the classic Boss Slow Gear, to give you that violin-style swell attack. One advantage: this one doesn't cost $800.

Model: TC Electronic Crescendo
Made: China, 2023
Serial: S230900097CQ1
Type: auto swell
Power: standard 9v DC negative power supply (not included)
Equivalent new street price (approx): $99aud
Mods: none
Accessories: original box and manual

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