Line 6 Pocket POD Amp Emulator and Multi-effects Processor Features: 300+ presets 32 amp models 16 cabinet models 16 effects 4-way navigation pad Chromatic tuner (can be set to mute for onstage tuning between songs) USB connectivity Edit presets on the computer with free software from Line6.com CD/MP3 player input jack Portable design Weight: 6 oz Dimensions: 5″ x 3.25″ x 2.5″ Runs on 4 AAA or optional DC power adapter (sold separately)