Applications: School General Technical Room, Science and Technology Activity Room Equipment, Science and Technology Museum Student Science. Parameter: Input voltage: AC100V240V 50/60HZ Output voltage : DC12V 3A/4A Motor rated power: 24W Motor speed: High speed motor 18000r/min±15% Low speed motor: 10000r/min±15% Spindle speed: high speed motor 3000r/min±15% Low speed motor: 1600r/min±15% Spindle jump.