This is a portable and universal tuner used for the tuning of chromatic, guitar, bass, violin and viola. It will indicate tuning status by showing 2 sorts of color. Its tuning precision is up to &plusmn;0.5 cent. This tuner will be a good choice for you to keep your instrument in tune. Get one before supplies run out.<br><br>Features:<br>Small and exquisite appearance, convenient to carry.<br>360 degree rotatable design to match your need better.<br>Indicates tuning status by showing 2 sorts of color(green and white).<br>With a clip, it is easy to fix on the instrument.<br>Auto power off function, the device will turn off automatically if there is no signal present or operation in 3mins.<br>It can be used for the tuning of chromatic, guitar, bass, violin and viola.<br><br>Specifications:<br>Turning items：chromatic, guitar, bass, violin and viola<br>Turning key: C, F, Bb, Eb<br>Tuning range: A0 &ndash; C8<br>Pitch range: 430Hz - 450Hz<br>Tuning tolerance: &plusmn;0.5 cent<br>Power: 1 * CR2032 battery (not included)<br>Display size: 3.1 * 2.2cm / 1.2 * 0.9in<br>Product weight: 33g / 1.2oz<br>Package size: 6.4 * 5.5 * 4.5cm / 2.5 * 2.2 * 1.8in<br>Package weight: 46g / 1.6oz<br><br>Note:<br>Remove the battery if you don&#39;t use it for a long period.