Tascam CD-GT 2 portable CD guitar trainer - CD-DA/CD-R/CD-RW disc playback, 10 second anti-shock memory, tempo control (without affecting key), key control, pitch control, single loop, all loop, and seamless in-out loop, guitar canceller with selectable cancelling pan point and selectable frequency range, multi-effects processor for guitar and mic effects with up to three effect modules, chromatic or manual tuner, metronome, 6.3mm guitar/mic input with level control, 3.5mm stereo line output, 3.5mm stereo headphone output, matrix LCD display, battery operated, optional power supply (PS-P520).