Count of 2 Boxes Each box contains a holder with 2 brush heads; one in size S/M and the other in size L Petosan Silentpower Toothbrush for Dogs, combines the benefits of a double headed toothbrush with new Sonic Technology. The 45 degree angle of brush heads allows you to reach both above and below the gum line. 20,000 Bristle Strokes per minute allow you to clean your pets teeth quickly and more effectively than a manual brush. Replacement brush heads available. Recommended to use different brush heads if brush is to be used on more than one pet to avoid cross contamination. Includes AAA battery. Combines the benefits of a double headed toothbrush with new Sonic Technology Allows you to reach both above and below the gum line 20,000 Bristle Strokes per minute Recommended to use different brush heads if brush is to be used on more than one pet. The battery powered, double-headed, sonic toothbrush is probably the best pet toothbrush in the world. The brush has 20,000 bristle movements per minute and is highly effective at removing plaque. Each package contains a holder with 2 brush heads; one in size S/M and the other in size L The Silent Power is delivered without a battery, as we have experienced leaking batteries in cases where the product have been stored under hot conditions or in certain cases when shipping with airfreight. Buyer should contact us within 30 Days after receiving the item. Refund given as Money Back or Exchange Return shipping will be paid by your buyer We are unable to accept used and opened products. If the item you received is defective, please notify us within 14 days. We will send you a brand new replacement and provide a return shipping label for the defective product. Returns unopened, unused and items with manufacturing defects are accepted but MUST be mailed back in its ORIGINAL (FACTORY) PACKAGING WITH TAGS ATTACHED. The merchandise returned must be in the original packaging and un-used. Buyer pays return shipping Unopened items. Postage on returns unopened buyer pays.. We will be responsible for the shipping on the replacement.