?Tips when trimming? In order to avoid blunt scissors, if the dogs hair is too long or too dense, please adjust to the minimum amount of hair(0.8), so that you can repear the trimming until you are satisfied with the trimming. We provide 30 days product replacement or refund if you are not satisfied. Contact us at any time, thanks a lot. ?4 guard combs ?(3mm/6mm/9mm/12mm). The adjustable clipping comb is applicable for clipping hair of different lengths; and the detachable guide combs make for quick, easy comb changes and increased versatility. ?Low vibration and ultra quiet design?The noise when working is only about 50 db, to help the pet feel at ease, not afraid cut hair any more. ?Safe and Sharp Blade ?Upgrade stainless steel fixed blade and ceramic moving blade can provide excellent cutting performance. The blade sharp enough for a long time using. Detachable blades, easy to change and clean. ?Built-in Li-ion Battery ?Rechargeable dog trimmer with built-in Li-ion battery is good for exceptional flexibility. It can also be used when charging so you don't have to worry that it will stop working and have half groomed dog.