Feature: 1. [Long Lasting Use]‑Dog nail grinder has coarse grinding wheels for a sturdy, long lasting fit for pets large and small. Low shock and low noise, pets do not escape, do not resist, and grinder their nails faster. 2. [3 Ports]‑Pet nail grinder for dogs 3 ports are suitable for pets of different sizes: port 1: suitable for small pets, port 2: suitable for large pets, port 3: suitable for quick nail grinding. 3. [Safe and Effective Trimming]‑Dog nail grinder for large dogs uses an advanced bit grinder to provide the safest and most comfortable pet paw grinding. Easy to carry and use even outdoors. 4. [Long Running Time]‑Dog nail fileis made with a 350mAh battery that easily charges via a 5V USB cable and connects to a laptop, AC adapter, car or power bank. 2 to 3 hours full charge, lasts 18 hours. 5. [Charging Light]‑Dog nail trimmer red light when charging, green light when fully charged. Recommended by veterinarians and pet grooming professionals for easy trimming of your pet's nails anytime, anywhere. Specification: Item Type: Dog Nail Grinder Material: TPR Battery Type: Nickel Cadmium Battery Battery Capacity: 350mAh (shipped with built in battery) Charging Method: With USB Charging Cable Running Time: About 18 Hours Charging Time: About 2-3 Hours Charging Light: Red Light When Charging, Green Light When Fully Charged . Package List: 1 x Dog Nail Grinder 1 x Protective Case1 x USB Charging Cable1 x English Manual