Features 1. One click start for two-stage grinding, with four grinding edges for rough and fine grinding. Two stage high-speed sharpening makes the blunt blade as sharp as new, improving cutting efficiency and making it a good helper for sharpening. 2. Sharpening without the need to choose a location, wireless charging, sharpening without the need to choose a location, eliminating wired connections and making sharpening easy anytime, anywhere. 3.  Hidden bottom charging, open the bottom compartment, remove the charging cable and thread it through the guide rail, close the bottom compartment and connect it to the power source for charging. When the indicator light is fully lit, charging is complete. Hidden bottom charging, easy to store, does not take up space. 4. Usage: 1. Turn on the switch, hold the sharpener with your left hand, and adjust it to the appropriate gear according to the tool. (I is the medium low speed range, II is the high speed range) 2. Knife grinding machines are divided into coarse grinding and fine grinding. They can be coarse grinding first, followed by fine grinding, or directly fine grinding. 3. Hold the tool with your right hand, place the end of the tool in the polishing position, and then pull it back to the tip to make it even. 5. Suitable for multiple blade types, one coarse grinding blade is suitable for cutting, and two fine grinding blades are suitable for daily maintenance and grinding. Suitable for table knives, scissors, fruit knives, vegetable knives, kitchen knives, chef knives, etc. Sawtooth knives and ceramic knives are not suitable for this type of sharpener. Specifications: Product Name: USB Charging Electric Sharpener Dual design of high-speed gears and low-speed gears Input voltage: 5V Power: 5W Material: ABS+stainless steel Battery capacity: 1200mAh Charging time: 2 hours Continuous usage time: 2 hours Function: Dual speed power regulation Suitable for various types of knives: dull cutting knives/kitchen knives/multifunctional knives/chef knives/fruit knives/cooking knives. Package Include: Multi functional knife sharpener * 1 Charging cable * 1 Explanation * 1