Ultra Compact!  Ultra Features!  6 DSP effects built in (including chorus, flanger, phaser, tremolo and delay/reverb) PLUS 7 COSM amp models mean this little brute really sings!  Fill it with batteries and sling it over your shoulder, or plug it in for practice time! Digital Tuning Fork feature capable of flat tunings up to 2 semi-tones, recording / headphones output and stereo/auxiliary input for CD players. Includes carrying strap and runs on battery (6 x AA ~ 20 hrs.) or AC power. A terrific little practice / recording amp!