【Upgrated Motor and 2 Runing Speed】Our dog nail grinder choose an upgraded higher quality motor，It is more powerful. the torque is controlled to 40 dB while boosting the torque, and it can even polish the metal，Choose 2 different rotation speed based on the hardness of your pet，Keep puppies from being disturbed by noise，Provide better nail care for Large dogs. 【Super Strong Motor & 2 Speed】Equipped a large capacity 2200 mAh rechargeable Li battery, which has a larger discharge current, making the motor 5 times stronger than the old version. This dog nail grinder uses the latest upgraded high quality super powerful motor, comes with 2 SPEED fast rotation which makes it trim thick and long nails of big breed pets quickly and smoothly. 【Super Low Noise & Vibration】Our electric dog nail grinder for large dogs apply superior diamond bit grinder with whisper-quiet technology that produces very low noise (< 50db) and vibration to keep pets calm and help grinding easier. 【Safe, Effective & Precise Trimming】This dog nail grinder uses an advanced Diamond Bit Grinder & Powerful Motors to deliver the safest, most comfortable pet claw grinding. Compared with manual dog nail clippers, our pet nail grinder will avoid over cutting nails or hurting your pet. Recommended by veterinarians and pet grooming professionals, painlessly and precisely trim your pet's nails anywhere. 【Long-lasting & USB Rechargeable】With red charging indicator and green fully charge indicator, the dog nail trimmer can last 5 hours after a 1.5-hour full charge. An USB charging cable is included to connect to laptop, AC adapter, or power bank for easy charge.