GB-10 is the ideal practice tool for musicians of any skill level to build their technique. A tuner and metronome are also built-in for precision playback. GB-10 includes a 2GB SD card for loading in the music collection. Variable speed audition allows musicians to independently change the speed and pitch of MP3 or WAV playback. The tabletop design is perfect for practicing almost anywhere. A tuner and metronome are also built-in for precision playback. A 3-button footswitch input for TASCAM optional RC-3F allows hands-free control.