This little guy will run on batteries or your standard 9v 500mA Boss style pedal power adaptor. Nice!

Model: Laney Supergroup Mini Amp (SUPERG)
Made: China, recent model 
Type: solid state, battery powered
Serial: XDE018616381
Output: 3 watts
Power: batteries/9V DC 500mA adaptor (not included)
Speakers: 3" x1
Mods: None
Weight: 1kg approx
Accessories: original box

Condition notes: All tested and fully functional.
Overall: very good condition (8/10)