Professional 2 speed clipper: 3400 spm and 4400 spm. Designed for super fast cutting. Runs so cool, fans and air vents that can become clogged with hair are not needed. Quiet operation to please even the most sensitive animal. Removable drive cap for easy cleaning. Locking blade hinge keeps blade secure. Break resistant housing material, withstands harsh chemicals. Sealed motor for cool, quiet long life. Maintenance free no oiling or greasing of internal parts is needed