SImple, minimalist, good. Three series stuff works just fine, and this also works just fine too. Great as an always-on amp style reverb. 

Model: JHS 3 Series Reverb
Made: Kansas City, USA, recent model (serial 21513022)
Type: reverb
Power: standard 9v negative supply, not included
Switching: true bypass
Equivalent new street price (approx): $165aud
Mods: none
Accessories: original box and manual
Condition notes: used, few minor marks, very good condition