Item Type: String Winder <br>Material: Plastic + Metal <br>Battery Type: Lithium battery (shipped with built-in battery) <br>Battery Capacity: 800mAh <br>The Highest Speed: 15KHz <br>Overcharge Protection Voltage: 4.3V <br>Working Voltage: 2.7～4.3V <br>Working Speed: 5 R/Min <br>Charging Time: 2-5 Hours <br>1、The multi-function winder can be used to wind or tighten the strings of any instrument <br>2、Suitable for guitar, banjo, violin, bass, suitable for most acoustic and electric guitars and any other stringed instruments <br>3、The unique shape of the puller can work easily and happily without damaging the guitar bridge <br>4、Electric winder and reliable thread cutter, simple operation, time-saving and labor-saving, convenient for daily use <br>5、Due to the compact and lightweight design of the multi-function winder, very easy to store and carry1 x&nbsp;String&nbsp;Winder<p>1 x&nbsp;USB Cable</p> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.