Performance Plus GA4P-A Portable Mini Guitar Amplifier Wood Cabinet, Overdrive, Headphone Jack, Really Loud! Wood cabinet amp, not Plastic like other small amps. 4 inch Speaker, Volume and Tone controls, Overdrive / Boost Switch 3 Watts RMS (6 watts music power) Input for Guitar or Microphone., Headphone Jack Operated from 9 volt battery or ac adapter (neither are included) Includes Carrying Strap