Features 1. One-click start for two-stage grinding with four grinding edges for both rough and fine grinding. Two-stage high-speed sharpening restores dull blades to a like-new sharpness, improving cutting efficiency and making it an ideal tool for sharpening tasks. 2. Wireless charging capability allows for convenient sharpening without being restricted by location. Eliminates the need for wired connections, enabling easy use anytime and anywhere. 3. Hidden bottom charging design: open the bottom compartment, remove the charging cable, thread it through the guide rail, close the compartment, and connect to a power source. Charging is complete when the indicator light is fully illuminated. The concealed charging system allows for easy storage and saves space. 4. Instructions for use: 1. Turn on the switch, hold the sharpener with one hand, and select the appropriate speed setting based on the tool. (I is medium-low speed, II is high speed) 2. The sharpener features coarse and fine grinding slots. For best results, perform coarse grinding first, followed by fine grinding, or use fine grinding only if needed. 3. Hold the tool with your other hand, place the blade tip into the sharpening slot, and pull it smoothly toward the handle end to ensure even sharpening. 5. Suitable for multiple blade types. One coarse grinding slot is ideal for sharpening cutting blades, while two fine grinding slots are designed for regular maintenance. Compatible with table knives, scissors, fruit knives, vegetable knives, kitchen knives, and chef knives. Not suitable for serrated knives or ceramic knives. Specifications: Product Name: USB Charging Electric Knife Sharpener Dual-speed gear design (high and low speed) 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 Compatible Knives: Dull cutting knives, kitchen knives, multifunctional knives, chef knives, fruit knives, cooking knives. Package Includes: 1 x Multi-Functional Knife Sharpener 1 x Charging Cable 1 x User Manual