Feliway Classic Starter Kit for Cats (Diffuser and 48 ml Vial) N/A Made in the USA or Imported #1 brand used and recommended by veterinarians Clinically proven to work. Reduces urine spraying in 9/10 cats. Can see results within 7 days. Drug-free solution that helps reduce signs of stress such as peeing outside the litter box, scratching and hiding FELIWAY CLASSIC Starter Kit includes one diffuser head that lasts up to 6 months and one vial that lasts up to 30 days, covering an area up to 700 sq. ft. 100% satisfaction guarantee.