Fresh Plant-Based Formula - Made from natural substance, removes stubborn black stains ,leaving their mouth fresh and clean Whitening Pen Set -2 pens - White pen can penetrate into the gums, remove tartar and stubborn dental stains on the teeth, soften the teeth on the calculus, make the calculus lose and fall off. Blue Pen - Dental care formula, all-round care of oral and gums, repair gums, strong teeth, so that teeth more bright and white luster, contains natural plant fresh oral formula, so that the mouth is fresh and natural. Strengthen Gums - Small head tip for those hard to reach places. Get rid of pet's bad breath by repairing damaged gums and fortifying it, care of the mouth. Solve Pet's Brushing painful-Having periodontal diseases is painful for your pet , Soft brush makes cleaning painless and less stressful. Safe for Pets - anti-slip design is convenient for you to operate and help you maintain healthy teeth and a happy lifestyle for your pet. How to Use? Step1 Open the lid and turn it to rotate the oil.( One drop is OK ) Step2 Apply to the dog's teeth with a white pen,and keep it for about 3 minutes Step3 fter cleaning,apply to the teeth with a blue pen to repair the anti-inflammatory. and refresh the mouth.