32120 Brand new and high quality Mini digital tuner for guitar， bass， chromatic， or else Tuning mode: Auto Tuning items: Chromatic， Guitar， Bass， Violin， Ukulele Can be freely rotated A4 frequency: 440Hz Tuning range: A0 (27.5Hz) to A6 (1760Hz) Power supply: 1 x CR2032 button battery (Not included) 1 x Mini clip on guitar tuner