1、Display data using a digital display, convenient to adjust the instrument while watching the data. 2、Due to its compact design and the clip-on feature, the tuner can easily be attached at the headstock of the instrument. 3、Sensors with very high sensitivity can accurately acquire instrument data. 4、It is suitable for many kinds of musical instruments, such as guitar, bass, violin, Ukrainian, etc. 5、Small size, single button operation, very simple to use.Feature: Display data using a digital display, convenient to adjust the instrument while watching the data. Due to its compact design and the clip-on feature, the tuner can easily be attached at the headstock of the instrument. Sensors with very high sensitivity can accurately acquire instrument data. It is suitable for many kinds of musical instruments, such as guitar, bass, violin, Ukrainian, etc. Small size, single button operation, very simple to use. Specification: Cent display: -50 ~ +50 cents Two-color backlight: green - accurate; white - inaccurate Picking range: A0 (27.5Hz) - C8 (4186.00Hz) Calibration error: ±0.5 cents Power: 1 *  CR2032 button batterycolor:#E53333;(No-include) Size: 34*30.5*82.4mm Weight: 32g Suitable for: 12 equal temperament, guitar, bass, violin, ukulele Package list: 1 * Guitar Tuner 1 * User manual Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store