Features: 1.As Sharp As New: Our electric knife sharpener is designed for home kitchen use,bringing you professional results conveniently at home.Works on stainless steel kitchen knives,but not ceramic or serrated. 2.The Correct Sharpen Steps: Obliquely insert the dull knife and closely touch the outside wall,and then pull it from outside to inside to sharpen. 3.2 Stage Design to Sharpen Polish: Professional 2 stages sharpening system for crude and fine can perfectly satisfy your knife sharpening needs.The crude stage can sharpen knives quickly,and the fine stage can polish them more smoothly,delivering a sharp,burr-free edge. 4.3 in 1 Multifunctional Knife Sharpener: Besides sharpening kitchen knives,S820 also can sharpen scissors. 5.Usage Tips: We recommend no more than 10 minutes of use at a time,or it will cause the motor to overheat and quit working.The exact time will vary depending on the weather and temperature. Specification: Material:PP + Diamond Grinding Wheel Product Color: Black,Blue Product Size: 22 x 8.5cm Product Weight: 350g Power: 50W Frequency: 50Hz Package Included: 1 x Electric Knife Sharpener