The KM-3909 Kemei Professional Trimmer comes with finest stainless steel blade and self-sharpening technology for improved cut. It has powerful motor that increases the performance. It is suitable for professional and personal use. It has low vibration and low noise which made it very handy and useful. The KM-3909 has adjustable trimming range, washable head and rechargeable battery that’s makes it handy and easier to use.