Fender Standard Jazz Bass Left-Handed - Black SYF_Fender_36_0 RedSets the output level when

RedSets the output level when the red LED is lit

cut-through-the-mix lead tone

turn counterclockwise to soften the highs

Exp Jack: This is an expression pedal control jack for the pitch

These are just a few suggestions

Fender Standard Jazz Bass Left-Handed - Black SYF_Fender_36_0 RedSets the output level whenProfessional bassists in all musical genres have relied on the Fender Jazz Bass guitar since its 1960 introduction for its rich tone and musical versatility. The left handed Standard Jazz Bass combines the best of old and new, with modern single coil pickups, shielded body cavities, medium jumbo frets, vintage style bridge, tinted neck with rosewood fretboard, three ply parchment pickguard and '70s style headstock logo.