Specififications: Voltage: 110v/60Hz Power: 1000w Blades Width: 2mm to 10mm Blades Type: U type & V type Package Included: 1 * Tire Groover Machine 10 * U-shaped Blades 10 * V-shaped Blades 1 * Power Cable 1 * User Manual Notes: 1. Please do not touch the heat head and blade before self-cooling. 2. Please do not touch the tyre regroover machine and handle if hands are wet. 3. Please turn the voltage higher(clock wise) if feeling the pushing hard when grooving; and turn the voltage lower (counterclock wise) if the rubber tire fumes when grooving. 4. Please let the blade off the tire for seconds after minutes working rather than let the blade heated long time. 5. Please draw the power plug off if do not use the machine.