Salvo® Flea & Tick Collar protects dogs against fleas and ticks for up to 6 months. Our improved formulation kills fleas on contact and is effective against three species of Ticks, Deer Ticks, American Dog Ticks, and Brown Dog Ticks.• *Fleas:* Kills on contact so fleas don't have to bite your dog.• *Ticks:* 3 species of ticks including Deer ticks, American dog ticks and brown dog ticks.• *Lice:* Rapid elimination of chewing lice.• *Waterproof:* Continuous protection even after bathing.• *Long-Lasting:* Time released technology for continuous protection.