Cherub ST-710 Suction Cup Tuner For Bass Guitar Ukulele Violin This is a special original Suction Cup tuner! The super strong suction cup replaces the old clip to make it portable、 fashionable and simple without affecting the beautiful headstock. Rotate the tuner 90 degrees to turn on\/off. The innovative zero-button design、 chromatic tuning mode and high brightness color LCD make the tuning become easier and more convenient.  Specification:  Color: Black Tuning range: A0(27.5Hz)~C8(4186Hz) Tuning mode: Chromatic Accuracy: ±1 cent A4 range: 440Hz Tuning method: Auto Power Supply: 3V (CR2032) Lithium battery Dimension: 44(W)X31(D)X26(H)mm Weight: 23g  Package Included:  1x Cherub ST-710 Suction Cup Tuner