Here we have a tasty boost based on the famed Echoplex EP-3 Echo Machine pre-amp. It's a super tidy tiny footprint but packs a beefy 20dB boost... it sounds great, you will like it. It's very likeable. 

Model: Xotic Effects EP Booster
Made: USA, recent model
Type: boost/preamp
Power: standard 9v negative supply (not included)
Equivalent new street price (approx): $205aud
Mods: none
Accessories: original box
Condition notes: used, no major marks, excellent condition