GA15II is the best choice for your first guitar amp.Moreover, with additional AUX in, it will enable guitarists to play along with MP3 players. Control Knobs: DRIVE?CLEAN switch, GAIN (DRIVE Ch), VOLUME (DRIVE Ch), VOLUME (CLEAN Ch), Bass, Middle, Treble Connections: NPUT(Phone Mono Jack), PHONES(Mini Jack), AUX IN(Mini Jack) Speakers: 16cm Full Range x 1 Rated Output: 15W