?2 Functional Heads?Our pet nail grinder for dogs comes with two replaced heads: nail grinder and pet nail trimmer to meet all your needs for pets' nails and hair. The replaced heads can be switched easily. ?3 Speeds & 3 Grinding Ports?The quiet dog nail grinder are featured with 3 speeds and 3 ports for small, medium and large pets. Choose the right port and speed according to your pet's size and nail hardness. ?Low Noise & Vibration?Our dog nail grinder 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. ?Fast & Effective?The dog nail grinder small dogs adopt powerful high speed motor and diamond bit to deliver fast pet claw grinding, having your pet's nails and hair done anywhere painlessly and smoothly. ?Long-lasting & USB Rechargeable?They can last 1.5H as dog toenail trimmer and 1H as nail grinder for dogs after a 3H full charge. An USB charging cable is included for easy charge.