This Portable Mini Guitar Practice Amp plugs directly into your guitar and eliminates the guitar cord. Tired of the mini amps that keep falling over because your guitar cord weighs more than the amp? Then this is the mini guitar practice amp for you! This mini guitar amp runs on a 9 volt battery and fits in your case. You can take it and play it anywhere. Delivers about 1 watt and gets a nice tubey overdriven sound with amazing sustain when cranked!