The STC 30 Plus is a power supply that operates with select Mountz electric screwdrivers. It is single tool controller that is designed to operate at both 110v and 230v. Switchable output voltage gives two-speed option on screwdrivers. The unit is can connect with the Scout screw counting system. Operates with Electric Screwdriver Models: A-Series, CL-Series, EF-Series, & K-SeriesModel:STC30 PlusTool Weight:1.8 lbs.Tool Length:7.5Tool Width:4.375Tool Height:3.375Rated Output:2.5AMaximum Output:5AOutput VDC:20/30V or 30/38VInput VAC:110/230VFuse Size:6.3A