Features: 1. As Sharp As New: Our electric knife sharpener is designed for home & kitchen use, bringing professional results conveniently at home. Works on stainless steel kitchen knives, but not ceramic or serrated blades. 2. The Correct Sharpening Steps: Obliquely insert the dull knife and closely touch the outside wall, then pull it from outside to inside to sharpen. 3. 2 Stage Design to Sharpen & Polish: Professional 2-stage sharpening system for coarse and fine grinding can perfectly satisfy your knife sharpening needs. The coarse 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 can also sharpen scissors. 5. Usage Tips: We recommend no more than 10 minutes of continuous use, or it may cause the motor to overheat and stop working. The exact time may vary depending on environmental conditions. Specification: Material: PP + Diamond Grinding Wheel Product Color: Black, Blue Product Size: 22 x 8.5 cm Product Weight: 350g Power: 50W Frequency: 50Hz Package Included: 1 x Electric Knife Sharpener