Concerning this item ✔Expert Shear Blades - Stainless steel shear blades are designed to prevent skin burns due to overheating. Precision blades that self-sharpen and endure a longer sharpness are capable of cutting through all hair types. It’s durable sharp. thin blade, free of card hair, and without causing surface skin damage. ✔Cordless/Corded with Extended Operation Duration: Equipped with a rechargeable 1200 mAh Li-ion battery, this robust hair trimmer can operate cordless for up to 200 minutes following a complete 1.5-hour charge. The men's trimmer lasts the entire day when used corded. The professional hair trimmer works well for hair cutting at home or at a barbershop because it has a power cord for fast charging. ✔Multiple Cutting Lengths: Four attachment combs (1mm, 3mm, 5mm, and 7mm) are included with the hair clipper. Users can change different combs according