a: a light powered watch has a solar panel built in behind the crystal, either above or underneath the dial. the flea & tick control for dogs, cats and small animals including puppies & kittens. repeat as needed, until they finally get the idea that it's not acceptable behavior. if you have a washer and dryer at home, then you know that it takes longer than one would think. call the merchant for more details on the package. call us today for more information or to request an estimate for your home. 