Benefits and features One click twostage grinding with four grinding edges for coarse and fine grinding. The twostage speed grinding makes dull blades sharp again, improves cutting efficiency, and serves as a reliable helper for sharpening kitchen knives. Wireless rechargeable design for cordless sharpening. No need to locate a power outlet or deal with cords, allowing easy sharpening anytime and anywhere. Hidden floor charging for space saving. Open the bottom compartment, route the charging cable through the guide, connect the bottom compartment to power, and monitor the indicator light until charging is complete. Simple twospeed operation and clear usage flow. Gear I is the mediumlow speed range, Gear II is the speed range. The knife sharpener provides coarse and fine grinding, which can be used in sequence (coarse first, then fine) or directly for fine grinding. For results, hold with the left hand, set the appropriate gear, then use the right hand to polish. How to use Step 1: Turn on the switch, hold the sharpener with your left hand, and adjust to the appropriate gear according to the tool (I = mediumlow speed, II = speed). Step 2: Use the coarse and fine grinding stages as needed. You can start with coarse grinding and finish with fine grinding, or perform only fine grinding. Step 3: Hold the tool with your right hand, place the end of the tool in the polishing position, and pull it back toward the tip to achieve an even finish. Practical use scenarios Daily kitchen knife maintenance to restore dull blades and improve cutting performance. Prep work in a restaurant or catering kitchen where reliable, quick sharpening is important. Home use in environments without easy access to outlets, benefiting from cordless operation and portable charging.