Red Spark 15 is 15w bass mini combo, ulra compact and light, a great choice for practicing at home and school. Featuring intuitive controls to shape your tone, Aux In for playing along with your favourite songs and Phone Out for your silent practice sessions. Ultra compact and light Power 15W Controls Input, Bass, Middle, Treble, Volume 3.5" Aux In for playing on your favourite backing tracks Phone out 3.5" Speaker Mini Custom 6.5"