Mighty Plug is a complete guitar or bass practice room that can fit in your pocket. Simply plug into your guitar or bass and connect headphones and you can play fully amplified guitar sounds along to your favourite tracks in complete silence. Inside this tiny device is a huge arsenal of amp models for guitar or bass, effects and acoustic models. Bluetooth connectivity lets you pair with a smart phone or tablet (search for "Mighty Plug") for playback of audio to jam to or for in-depth editing of the Mighty Plug amp and effect settings using the Mighty Amp app (downloadable from App Store or Google Play). No need to keep replacing batteries, as the Mighty Plug is rechargeable via the USB, which also serves as a computer interface for firmware updates and as a recording/playback interface. The Mighty Plug contains all you need for hours of practice, recording and sound exploration.