Digital Guitar Tuner, 360-Degree Rotatable Musical Instrument Accessories, for Tuning Guitar Chromatic Black Specification: Item Type: Digital Guitar TunerTuning Items: 12 Average Rate, Guitar, Violin, Bass, Ukulele Pickup Range: A0 (27.5hz)-C8 (4186.00hz) Tuning Method: Clip the Tuner to the Instrument and Pick Up the Sound Through Vibration Pickup Accuracy: +0.5 Cents Power Supply: 1 x CR2032 Button Battery (not included) Package List: 1 x Tuner 1 x User Manual