The Flanger FX-02 Musicians Tool is a rechargeable motorized guitar string winder, string cutter and bridge pin puller. The FX-02 is 80% faster at changing strings than manual restringing. Using a customised motor and planetary gears, provides a powerful torque drive system purpose-built for musical instruments such as Acoustics, Electrics, Classical, Bass guitars, Double Bass, Banjo, Ukulele etc. Recharge Anytime, Anywhere! The FX-02 uses a LithioN-Ion rechargeable battery which can be recharged by either a 5v DC adaptor, iPhone, iPod charger or through a computer using the USB to DC cable provided.