Knife Sharpener Professional 2-Stage Electric Knife Sharpener, Knife Sharpener for Kitchen Knives with Quick Sharpening and Polishing Function, Easy to use for all kinds of kitchen knives.Knife Sharpening Helper - One button start two-stage knife sharpening, two sets of four sharpening ports, coarse and fine. Two-stage high speed sharpening makes dull knives as sharp as new, improve the efficiency of cutting vegetables, is a good helper for kitchen knife sharpening.Sharpening Without Picking a Location - Wireless on-the-go, rechargeable, sharpening without picking a location, get rid of wired, easy sharpening anytime, anywhere.Hidden Bottom Charging - Open the bottom compartment, take out the charging cable and pass it through the guide slot, close the bottom compartment and connect it to the power supply for charging. Charging is complete when the indicator light is fully illuminated. Hidden bottom charging, easy to store without occupying space.Usage-1.Turn on the switch, hold the sharpener with your left hand and adjust it to the suitable gear according to the knife. (I is medium-low speed gear, II is high speed gear) 2. Sharpener is divided into coarse grinding and fine grinding, you can use coarse grinding first, and then fine grinding, or you can directly use fine grinding. 3. Holding the knife tool in your right hand, put the end of the knife into the grinding position mouth, and pull it backward to the tip of the knife at an evenWide Range of Applicable Knife Types - 1 position coarse grinding mouth is suitable for opening edge, 2 positions fine grinding mouth is suitable for daily maintenance sharpening. Suitable for table knives, scissors, fruit knives, fruit and vegetable knives, kitchen knives, chef's knives and so on. Serrated knives, ceramic knives are not suitable for this sharpener.