... mosquitoes fly to the net.It is not defect.How to use; please turn off fans,lights and close windows and ... when it is working.High efficiencyThe efficiency is higher than 90%.Environmental protectingInnoxious , inodorous, non-radiant, silent, safe and ... : Purple\blue\yellow High efficiency The efficiency is higher than 90%.Environmental protecting Innoxious , inodorous, non-radiant, silent, safe ...