Long Battery Life for 10h Working Time: The cordless dog grinder supports 10h working time which have a long battery life, solved the trouble of having to charge in advance for each use. And includes a USB wire that you can conveniently connect to laptop, AC adapter, or power bank to charge. Stepless Speed Regulation: Different from the two-speed, our dog nail trimmer are designed with stepless speed regulation. You can adjust the most suitable speed of grinding nail according to the hardness of the nail. More speed choices make you can safely and efficiently trim the dog and small animal's nails. Powerful & Quiet Motor: Exclusively using high-quality motor, the torque is controlled to 40 dB while boosting the torque, and it can even polish the metal. Let the puppy and small animals no longer be disturbed by the noise, the large breed nail care is no longer strenuous. Port Fits All Kinds of Pets: Equipped with stepless speed regulation switch, the trimmer port is widely applied to small, Medium, Large pets with different size nails.You can choose an appropriate port and speed depending on your pet's size and nail hardness for nails Grinding. Effective & Effortless Trimming: Casifor dog nail grinders are equipped with an advanced Diamond Bit Grinder which provides faster, more precise and comfortable pet claw grinding than nail clipper.