Item Type: Electronic Tuner_x000D_ Tuning Mode: Automatic Tuning_x000D_ Tuning Error: 0.5 Cent_x000D_ Power Supply: 1 x CR2032 button battery_x000D_ Tuning Items: 12 equal temperament, guitar, bass, violin, ukulele_x000D_ Product Size: Approx. 45 x 30mm / 1.8 x 1.2in 1[APPLICABLE SCENES] Multifunctional electronic tuner, 12 equal temperament, suitable for guitar, bass, violin and ukulele tuning, compact and practical. 2[LCD DISPLAY] The electronic tuner adopts LCD display, which is clear and intuitive, and can quickly read the tuning data, with high efficiency. 3[GOOD PERFORMANCE] The soft pad clip can prevent the instrument from being worn, and high accuracy signal analysis ensures sensitive response. 4[WITH BATTERY] Equipped with a CR2032 button battery, the automatic tuner is easy to operate and can be used anytime and anywhere. 5[ABS HOUSING] The guitar tuner shell is made of ABS plastic, which is non slip and wear resistant, not easy to deform or aging for a long time.1 x Button Battery 1 x Tuner 1 x User Manual