The Marshall MS-2 Portable 2-Watt Mini Guitar Practice Amplifier is the ultimate in portable battery or AC power supply operated micro amps with full 1-Watt of Marshall tone packed into a tiny case. The mighty micro Marshall half-stack has switchable Clean and Overdrive modes. A single Tone control provides full focus of bass to treble. Marshall MS2 Portable 2-Watt Mini Guitar Practice Amplifier have a headphone output so you can rock in private. This Marshall amplifier output can also be used to drive an external power amp effectively .