Features:- Small and exquisite appearance, convenient to carry.- 360 degree rotatable design to match your need better.- Indicates tuning status by showing 3 colors(green, red and orange).- With a clip, it is easy to fix on the instrument.- Auto power off function, the device will turn off automatically if there is no signal present or operation in 3mins.- It can be used for the tuning of guitar, chromatic, bass and ukulele.Turning Items: Chromatic, Guitar, Bass, Ukulele, ViolinDetection Range: A0(27.5Hz) – C8(4186.00Hz)Pitch Range: 440HzPower: 1 * CR2032 BatteryTuning Way: Clip(tune by vibration)Detection Accutacy: ±0.5 centPackage Weight : 32 G / 1.13 OuncesPackage Dimensions (L*W*H) : 82*45*33 MM / 3.23*1.77*1.30 InchesRetail Packaging: Yes, Colored BoxPackage Include:1 x Tuner1 x User Manual1 x Coin Battery