Tascam MP-BT1 Portable MP3 Bass Guitar Trainer 240-song memory capacity (based on average 4-minute MP3 encoded at 128kbps)^Variable Speed Audition changes the speed of the MP3 playback without changing the pitch ^Pitch control in 1% steps so you don't have to re-tune^Seamless looping for practicing tricky passages^High-impedance 1/4 inch bass input 240-song memory capacity Variable Speed Audition changes the speed of the MP3 playback without changing the pitch Variable Speed Audition changes the speed of the MP3 playback without changing the pitch Pitch control in 1% steps so you don't have to re-tune, Seamless looping for practicing tricky passages High-impedance 1/4 inch bass input Seamless looping for practicing tricky passages