Storage Type Power Cord Multiple charging options: can be powered from household sockets, mobile power supplies, or computer USB ports. The charger is stored under the product base and is visible when you open the lid for easy access. Safe and convenient setup: no need to remove the sharpener to recharge; charging is integrated under the base with the lid providing access. 3Speed Adjustment and BuiltIn Battery Three sharpening speeds: end, midrange, and lowend settings to match different blade conditions and hardness. Builtin largecapacity battery: can continuously sharpen more than 50 knives on a single charge, providing cordless operation for versatile use. Easy, Safe and Universal Use Simple to operate: place the knife in the sharpening slot and sharpen in seconds. Safe for most knives: suitable for all knife types, including hard steel blades. Use direction guidance: pull in your chosen direction several times and avoid pulling back and forth. Ergonomic Design Fourlevel sharpening system for precise results: stage 1 repairs and straightens damaged blades; stage 2 restores and polishes for a clean edge. Stable and comfortable: quality suction cup at the bottom provides a firm base, and the design is comfortable to grip during use. Use scenarios Quick edge touchups in a home kitchen between meals to maintain sharpness and efficiency. Regular maintenance for professional chefs or serious home cooks who use hardness or knives. Camping, outdoor cooking, or smallspace setups where cordless operation and stable performance are advantageous.