This Lifesystems 2-pin unit plugs into the mains &, with a tablet inserted in the slot, slowly emits an insecticide which is both harmless & odourless to humans, but is extremely effective against biting insects. Each pack contains 15 tablets. One tablet will last for Approx. 10 hours before needing to be replaced. Features 1 tablet provides up to 8 hours of protection Repels: Mosquitoes, midges, bed bugs & other biting insects Boxed-product Weight: 91g Contents: Killer Unit & 15 Tablets Treats: Approx. 30m 3 Active ingredient: Prallethrin Dimensions: 80 x 50 x 30mm Useage: Use indoors for maximum effect, ideal to be used during the night For 3-pin compatibility, convert appliance using the Lifesystems Universal Travel Adapters