Jungle Formulas Plug-In Mosquito Killer, kills mosquitoes, midges and other small flying insects by releasing a long lasting, odourless, insecticide vapour. It offers up to 45 nights protection, when used for an average of 8-10 hours per night. Jungle Formula Plug-In Mosquito Jungle Formula Plug-In Mosquito Killer can be plugged in and used overnight to kill mosquitos, midges and other small flying insects. It offers up to 45 nights of protection when it is used for an average of 8-10 hours per night. About Jungle Formula Plug-In Mosquito Its insecticide vapour contains 50% DEET, which is approved by the Hospital for Tropical Diseases for travellers visiting tropical areas with a high risk of malaria and other insect-transmitted diseases. This is also recommended by GP’s and travel clinics. This Plug-In has an automatic voltage converter (110-240v) and is, therefore, suitable to be used in all countries with a 2 pin socket. This accounts for the majority of European countries including main holiday and business destinations. It can also be used in other countries including the UK with the appropriate adaptor. Refills are available separately, but this pack contains 1 25ml refill.