ACTM-01 Clip tuner with metronome function. Can be used for guitar, bass, ukulele (KeyC, KeyD), violin, and chromatic instruments. Guitar and bass modes also support half-step down and whole-step down tunings. It uses a three-color color meter to clearly display pitch deviations with color. In addition, it also displays how many cents off the pitch is numerically (in 5-cent increments). The metronome's volume can be adjusted in three levels. Headphones (2.5mm micro jack) can also be used.