Item Type: Guitar Tuner_x005F_x000D_Material: ABS_x005F_x000D_Tuning Range: A0 (27.50Hz) to C8 (4186.0Hz)_x005F_x000D_A4 Value Range: 440Hz_x005F_x000D_Tuning Items: 12 equal temperament, guitar, violin, ukulele_x005F_x000D_Tuning Accuracy: 1 Cent_x005F_x000D_Power Supply: Rechargeable lithium battery (Included)_x005F_x000D_Size: Approx. 49x26x40mm/1.9x1x1.6in_x005F_x000D_Weight: Approx. 20g/0.7oz 1RECHARGEABLE BATTERY: The built in rechargeable battery of the guitar tuner allows continuous use of more than 10 hours per charge. 2LCD DISPLAY: Guitar tuner has a high contrast color LCD screen to display the tuning status, bright and clear. 3FLEXIBLE ANGLE: The guitar tuner has a powerful and flexible angle to obtain the best view, provides a comfortable using experience. 4AUTO SHUTDOWN: The guitar tuner has the function of automatic shutdown, which is power saving and could maximize the battery life. 5HIGH ACCURACY: Electronic automatic tuner has high tuning accuracy, with the error of 1 cent, practical and reliable.