So There Super Clip-On Tuner for Guitar, Bass, Ukulele, Violin & Other Stringed Instruments Fast, accurate, easy operation - just clip it on and tune it up, pitch-perfect tuning in seconds, battery included Compact design - unobtrusive, it never gets in your way, very lightweight Bright, easy view display - the multi-color led back-lit screen is easy to see in any lighting Holds on tight and will not harm your instrument's finish, the swivel clamp and large single multi-function switch means one-handed operation All-instrument tuning - with five tuning modes: C, G, B, V, U (chromatic, guitar, bass, violin, and ukulele) to cover a wide range of instruments