FELIWAYFRIENDShelps to reduce conflict between cats living together, and prevent signs like fighting, chasing, blocking, staring. This item is being supplied from continental Europe. Please consider an adaptor might be needed to plug it in your country. Benefits: - Helps your cats get along better at home. When used continuously it helps to maintain constant harmony. - Clinically proven and veterinary recommended. Instructions: - Just plug and play: screw the vial onto the diffuser unit and plug it into an electric socket. - Leave the diffuser switched on continuously to keep your cats in harmony. - Each diffuser refill covers an area up to 70 m2 - Avoid plugging in the diffuser under shelves, behind doors, behind curtains or behind furniture, as it will not work - The diffuser should be checked monthly and replaced every six months to ensure optimum effect.