Item Description: Battery: 1x CR2032 Battery Display: Double Color Backlighting Display Weight: 23g Tuning Range(HZ): 0A(27.50Hz) ~ 8C(4186.01Hz) Color: Black Turning Items: Chromatic, Guitar, Bass, Ukulele, Violin Function: JOYO JT-12B Mini Clip-on Digital Tuner with LCD Backlight Features: - A mini tuner newest designed for chromatic, guitar, bass, violin and ukulele. - LCD screen with backlight to display operations, and can 360 degree rotate for best viewing. - With a clip, the tuner must be clipped onto your instruments to tune. - Packaged with a CR2032 battery, power off automatically after 3 minutes for saving the battery if no operation. Brand: JOYO Model: JT-12B A4 Frequency: 430 ~ 450Hz Tolerance: + / - 1 cent Semitone Flat: b, bb Screen Display Modes: - Flat: Point toward left and the screen in white - Sharp: Point toward right and the screen in white - In Tune: Point stays vertical and the screen in green Product Weight: 23 G / 0.81 Ounces Product Dimensions (L*W*H): 42*57*15 MM / 1.65*2.24*0.59 Inches Package Weight: 44.0 G / 1.55 Ounces Package Dimensions (L*W*H): 150*95*20 MM / 5.91*3.74*0.79 Inches Retail Packaging: Yes, Blister Packaging Package Included: 1x User Manual 1x CR2032 Battery 1x Tuner