Feliway Friends Happy Cats Refill for Diffuser, Long-Lasting Harmony, 30 Days of Use, 48 ml Refill

1-Screw the bottle onto the diffuser and plug it into an electrical outlet. 2-Leave the diffuser on at all times to maintain harmony among your cats. 3-Each refill lasts about 30 days. Each refill covers an area of 70 m² (roughly a 3-bedroom house). Avoid plugging the diffuser in under a shelf, behind a door, a curtain, or a piece of furniture, as it will not work properly. To ensure your cats get along well, use a FELIWAY Friends refill every month.