Two Shoo.TAGs for flies and two Shoo.TAGs for mosquitoes included. When using both tags, please cut one tag on the dotted line to allow the magnetic strip on both tags to face your pet. * Shoo.TAG is the ultimate solution for protecting your pets from targeted pests * Shoo.TAG uses no harmful chemicals, is odor-free, waterproof and is safe for pets, people and the Planet * Shoo.TAG is easy to use; simply remove from the packaging and attach to your pet?s collar with the provided split ring, with the magnetic strip facing your pet. * The key to Shoo.TAG is the three dimensional electromagnetic static field embedded in the magnetic strip