Zero In 60-Day Citronella Diffuser, Portable Insect Control 40mPortable, adjustable insect control diffuser with citronella fragrance for use at home and abroad for holiday travelInsect cassette can be used in households, as well as on patios, porches, terraces and balconies in gardensAdjustable slow release dispenser - will treat an area up to 40 m3 when fully openedEasy to use, simply twist to open and twist to close; lasts for up to 60 daysCitronella diffuser can be used indoors and outdoorsIdeal Garden or Holiday repellant‚