The machine is self propelled with hands free operation. Built with a durable 9 Amp/115 Volt/60 cycle electric motor, it is equipped with a quick-disconnect plug for added safety. Recommended for use with 24 gauge panels maximum. The machine is exceptionally lightweight and fast and comes with a thirty day manufacturer's warranty. All roof seamers come with a user-friendly owners manual. Seamers can be designed for architectural style roof panels with a 1 in., 1-1/2 in. or 2 in. seam height and either a 1/2 in. or 3/4 in. unseamed female leg width can be formed into a 90 degree or 180 degree seamed profile. Capable of seaming radius panels. Built in the U.S.A., CNC machined at Developmental Industries. Aircraft aluminum, No cast parts. Exceptionally lightweight and fast. Milwaukee 9 amp/115 volt/60 cycle electric motor.