Brand - Cyclone® Model - first generation, but very dependable. Adjustment Knob - 10 turn adjustment knob, really fine tube your voltage. Maximum Voltage - 20 volts. Digital Display - Show the machine Voltage, Duty, Speed, & Follow Through. Rotary Compatibility - Yes, can work with rotary machines. Power Input - AC110-240V (Can be used in Any Country). Warranty - 1 year limited warranty.