Please feel free to contact us if you feel any problem. We will provide you satisfactory solution. Powerful motor & battery:make the noise quieter than other similar products. Long time duration of the powerful battery is enough to provide a perfect fit cut or taper. USB Fast-Charge & LED display:Long-lasting powerful rechargeable battery with a run time of up to 240 minutes for charging 3 hours.The LED display of this clipper clearly shows remaining percentage of battery. Adjustable thumb taper lever enables easy haircut length adjusting From 0.8mm to 2.0mm.Also equipped with 8 guide combs(1.5mm,3mm,4.5mm,6mm,10mm,13mm,16mm,19mm)You can easily adjust the comb to the right height and cut out the hairstyle you want. Self-Sharpening high-carbon blade:Our high carbon-steel cutting blades, stay sharp longer to cut all hair types.For cutting hair or shaving beard without sticking.Provides accurate and consistent performance.