The Hertzko HNG-31 Electric Pet Nail Trimmer is a USB-powered device designed for easy and safe pet grooming. It features a purple color and a compact design that makes it easy to handle. The nail grinder is suitable for dogs of all sizes and comes with a USB cable for convenient charging. The Hertzko HNG-31 is a reliable and efficient tool for pet owners who want to keep their pets' nails trimmed and healthy.