The Li2000 3 Position Rechargeable Screwdriver has a 3.6-Volt Lithium Ion Battery that holds a charge for up to 18 months. The three-position handle lets you work in tight spaces comfortably. It has a spindle lock that allows manual screwdriving and greater control. It has a forward and reverse switch for easy screwdriving and screw removal. This screwdriver is ideal for furniture assembly, installation of mini blinds or other window coverings, and mounting of storage and decorative shelving.