Designed to be so quiet, it won't disturb a phone conversation, and that's ideal for busy offices and other professional situations where every word counts. In fact, it's four times quieter than typical electric sharpeners, to deliver a softer sound and an ultra low decibel level. Equipped with two X-ACTOÂ® hardened steel cutters, SafeStartÂ® (sharpener will not start if receptacle is not closed), a large shavings receptacle and proprietary motor system that increases durability. ETL Listed. Manufacturer's limited ten-year warranty.