1. 3SPEED SETTING AND BUILTIN SHARPENER It features 3 adjustable levels for , medium, and low ranges. The builtin capacity sharpener can continuously sharpen over 50 knives. 2. ERGONOMIC DESIGN Our diamond steel sharpener is equipped with a 4stage sharpening system to achieve an extremely sharp blade edge. The first diamond stage repairs and straightens damaged blades, while the second stage performs a clean restoration and polish. Comfort is also prioritized in the design: The quality suction cup at the base provides a stable grip, making it comfortable and easy to hold. 3. STORAGETYPE POWER CORD Multiple charging options: household power outlets, mobile power sources, computer USB, etc. Please note that the charger is located under the product base and can be seen when the cover is opened. 4. EASY, SAFE, AND UNIVERSAL USE Our sharpener set is simple to operate. Just place the knife into the sharpening slot and enjoy a renewed edge in seconds. It is safe to use and suitable for all types of knives, including quality 'hard' steel knives. (Please pull the knife toward you several times and avoid moving it back and forth.)