Product description Material: ABS Colour: Black Motor operating voltage: 2.4V Battery type: 600mAh Ni-MH Charging time: 3h Working time: 4h Package contents: 1 * Claw Grinder 1 * USB cable 2 * grinding wheel 1 * user manual 1.Safe, Effective & Precise Trimming: Nail grinder uses an advanced Diamond Bit Grinder to deliver the safest, most comfortable pet claw grinding. Recommended by veterinarians and pet grooming professionals, painlessly and precisely trim your pet's nails anywhere. 2. Ultra Quite & Safe And Painless:Pet nail grinder for dogs and cats designed with low noise less than 60 db,which can protect your pets from fear,anxiety and antipathy,will makes grinding easier.Safe and painless with the diamond bit grinder,that can reduce the risk of over cutting and hurting your pet. 3.Advanced 2-Speed Switch & 3 Grinding Ports: Nail grinder with ergonomic design, easy handle easy operate.The small nail grinder could not scare your pet and quiet motor help to comfort your pet. 3 grinding mouths are suitable for pets of different sizes, so you can use it with confidence. 4.USB Rechargeable,More Convenient: Rechargeable dog nail grinder including a USB wire for your convenience. Easy to operate with cordless design; You can charge it with computers, power banks, car chargers when battery runs out. Perfect for pet grooming store or home using. 5.3 Hours Fast Charging, 4Hours Operating Time: Advanced lithium polymer battery to enable fast charging and long working hours. Portable USB data cable with overcharge protection. Rough surface, light body, very convenient and comfortable. The new, improved manicure instrument is safer and more effective when grinding large nails.