??Fine Adjustment Bar and Guided Combing—The fine adjustment lever (0.5-3mm) of the K38S hair clipper can easily adjust the cutting length. 8 standard length limit combs of 1.5mm, 3mm, 4.5mm, 6mm, 10mm, 13mm, 16mm, 19mm. The I38s detailed trimmer is equipped with 4 guide combs (1.5 mm, 3 mm, 4.5 mm, 6 mm). You can cut the size and hairstyle you want by using the right comb. ??Carbon Steel Blades—Replaceable carbon steel blades, properly aligned, cut smoothly and cut quickly. For a smooth clipper cut, use a brush to clean the blade before cutting, and use lube to maintain the blade regularly. The electric trimmer is made of stainless steel mostly. ??Low Noise, Continuous Standby, Rechargeable Base -- The clippers men is very quiet, the sound is below 60 decibels. With a speed of 6000 rpm, this professional body hair trimmer is suitable for dry and wet hair. The trimmer men can be used with or without a cord. The K38S is equipped with a 2500mAh built-in battery, and the I38S is equipped with a 2000mAh built-in battery. The equipped rechargeable base helps you hold and charge the grooming kits. ??5 Speed Adjustment and LED Display—This cordless clippers has 5 operating speeds, you can adjust to the appropriate speed according to your needs. The K38S hair clipper keeps working for 4 hrs after 3 hrs full charge. The I38s hair trimmer keeps working for 3 hrs after 3 hrs full charge. LED display shows the percentage of time of the power left. ??Grooming Kit—This clippers for men haircut contains a K38S hair clipper and a l38S detail trimmer. Hair trimmer is suitable for trimming inch heads, patterns, etc. It can be used as a home and hair salon hair clipper. Suitable for men's, women's and children's haircuts, it has a wide range of uses and is perfect as a holiday gift.