Easily replaceable and safe to handle solid ceramic cartridge refill. Choice of low/medium/high output options, hours of operation, days of operation and start time. Can be wall mounted or placed on a variety of surfaces, such as tables, as a portable system. Ceramic cartridges are 100% biodegradable and work without CFCs, aerosols, batteries and propellants. Cartridge life of up to four weeks (dependent on location conditions), with fragrance coverage of up to 17,600ft3. A unique collection of indulgent fragrances are available.