Features:<br>This portable tuner can be also used as a watch.<br>It is a great assistant to keep your chromatic, guitar, bass, and ukulele in tune.<br>A4 frequency from 430-450Hz to meet your better need.<br>360 degree rotatable head offers you the best viewing angle.<br>With a watchband, it is easy to fix on the instrument.<br><br>Tuning Accuracy Indicator:<br>Flat: The sign is on the left;<br>Sharp: The sign is on the right;<br>In-tune: The sign is in the middle.<br><br>Specifications:<br>Color: White / Black / Yellow / Lemon green (optional)<br>Tuning scale: Chromatic, Guitar, Bass, Ukulele<br>Flat: N/A, b, bb<br>A4: 430-450Hz<br>Power: 3V CR2032 lithium battery (not included)<br>Package size: 5 * 3.5 * 3cm / 2 * 1.4 * 1.2in<br>Package weight: 20g / 0.7oz<br><br>Package List:<br>1 * Tuner<br>1 * Watchband<br><br>Note:<br>The batteries are not included.<br>There are operation instructions on the packing box.