Built-in Li-ion Battery. Rechargeable dog trimmer with built-in Li-ion battery is good for exceptional flexibility. It can be used when charging as well as when charged. Safe and Sharp Blade. Upgraded stainless steel fixed blade and ceramic moving blade provide excellent cutting performance. Detachable blades, easy to change and clean. Low vibration and ultra quiet design. The working noise is only about 50 db which helps your pet to feel at ease. The adjustable clipping comb is great for clipping hair of different lengths and the detachable guide combs make for quick, easy comb changes and increased versatility. Kit comes with an extra blade, comb and scissors for fine grooming requirements.