?<strong>Features:</strong><br />Small and exquisite appearance， it is convenient to carry.<br />With a clip， it is easy to fix.<br />Comes with a blight USB LED light (2pcs LEDs)， can be adjusted at your suitable angle， simple and practical.<br />Up to 6 pre-beats setting.<br />Super bright backlight， LCD display(3.8 * 2.3cm)， it can provide excellent visibility.<br />Auto power off function， the device will turn off automatically if there is no signal present or operation in 5mins.<br />Rechargeable lithium battery， recharged via USB cable， no need of changing battery frequently.<br /><br /><strong>Diagram of metronome:</strong><table cellpadding="0" cellspacing="0">    <tbody>        <tr>            <td></td>        </tr>        <tr>            <td></td>        </tr>        <tr>            <td></td>        </tr>        <tr>            <td></td>        </tr>    </tbody></table><p></p><strong>How to use LED lights:</strong><br /><br /><br /><strong>Specification:</strong><br />Tempo range: 30-250bpm<br />Beat: -/4， 1/4， 2/4， 3/4， 4/4， 3/8， 6/8<br />Tempo precision: &plusmn;0.3%<br />A4 range: 420-460HZ<br />Power: 3.7V 600mA (lithium battery)<br />Product size: 7.6 * 5 * 3.5cm / 3 * 2 * 1.4in<br />Product weight: 62g / 2.2oz<br />Package size: 6.6 * 4.5 * 10.5cm / 2.6 * 1.8 * 4.1in&nbsp;<br />Package weight: 139g / 4.9oz<br /><br /><strong>Package List:</strong><br />1 * Metronome<br />1 * LED light<br />1 * USB cable<br />1 * User manual (English)