Professional 2-speed clipper: 3400 spm and 4400 spm. Quiet operation to please even the most sensitive animal. Locking switch button - will not accidentally shut off. Break resistant housing material, withstands harsh chemicals. Sealed motor for cool, quiet long-life. Runs so cool, fans and air vents that can become clogged with hair are not needed. Maintenance free - no oiling or greasing of internal parts is needed.