Features: 3-in-1 instrument restringing tool, electric string winder + string cutter + bridge pin remover. Motorized string winder and reliable string cutter, easy operation, saving time and effort. The unique shape of the puller works easily and pleasantly without any guitar bridge damage. Built-in rechargeable Li-ion battery and comes with USB charging cable. Compact and lightweight design, convenient to store and carry around. Suitable for various string instruments like guitar, bass, mandolin, ukulele, etc. Specifications: Color: White + Black Material: Plastic Power Supply: Built-in Li-ion Battery 3.7V 750mA Charging Method: USB DC 5V USB Cable Length: About 1 Meter Item Weight: 150g / 5.3oz Package Size: 25 * 15.5 * 5cm / 9.8 * 6.1 * 2in Package Weight: 287g / 10.1oz Package List: 1 * Restringing Tool 1 * USB Cable 1 * User Manual (English)