How to get your pet used to nail handling: Clipping your pet’s nails can be a tense and sometimes painful experience for them, and for you. First, show him the nail grinder and let him sniff it while it is turned off. Then, turn it on so he can get used to the sound it makes. Have him sit while the tool is running in your hand. Give him positive reinforcement. Once he is used to the tool, try touching it to his nails. If he's not ready, you may need to repeat the above steps a few times. Tips: If it is the first time for the pet to use nail grinder, it is recommended that the sharp fingernail or long wear parts should be grinded firstly, but not too much, avoid causing bleeding. For pet's safety, it should not be more than 5 seconds for one lasting time, and be aware to adjust the grooming angle to polish pet nails. How to use Step 1: Charge this nail grinder with USB for almost 4 hours.(the indicator light will turn to green when full charged) Step 2: According to the pet's size and characteristics of their nails, choose the suitable port for your pet. Step 3: Holding the grinder with one of your hands, holding the pet pads with the other hand, put its nail into a port gently, and then begin to grind. Step 4: Take off the plastic cover the grinder in an anticlockwise direction, turn it on and gently clean the surface of the nail grinder with eraser, paper or cloth to remove the nail powder. Specification Charging time: About 4 hours Running time: About 5 hours Input: AC100V-240V 50HZ/60HZ Output: 5V/1000MA Package Contents: 1x Pet nail grinder; 1x USB charging cord; 1x User manual Features & details Upgraded Powerful Pet Nail Grinder: Constructed with diamond bit grinder which is safer and more effective than nail clipper to trim pet nails, no replacements needed and powerful enough to trim your pets' nail in a short time 2-Speed Switch & 3 Grinding Ports - The pet nail trimmer has 3 ports for different sized nails. You can choose a suitable port and speed according to the pets' size and characteristics of their nails. Good for small sized and medium sized pets Rechargeable & Portable: Designed to be rechargeable by USB wire(included) with indicator light which turns on when charging or using. Once being fully charged, the grinder will be well-performed over 5 hours in continuously work Safe & Painless - With safe guard cap, no more worry about over cutting, nasty pains or bleeding for your pet. The motor is powerful and has low vibration, pets will not be afraid any longer Easy to Clean: Easy to remove the safe guard cap and nail grinder stone and then wipe them with a damp cloth.