shoo!TAG is a revolutionary chemical-free way to protect your pets from fleas and ticks, combining cutting-edge science and technology to produce a product that uses electromagnetic frequencies to keep pests away. The odor-free shoo!TAG has no odor and uses no harmful chemicals. Just attach the tag to your pet’s collar. A magnetic strip uses a 3-dimensional electromagnetic frequency that combines with your pet’s electrical field to create a protective barrier from pets. It reaches maximum strength within 36 hours of attachment. Protects your pets and family for up to 4 months.