Good Knight Power Activ+ System Is The Most Technologically Superior Mosquito Repellent Machine. The Pack Consists Of 3 Units Of Mosquito Repellent Refill. The Machine Comes With Dual-Mode Technology. The Liquid Mosquito Repellent Refill Contains 50% More Activ Molecules Which Makes It 50% More Powerful. It Ensures Low Electricity Consumption A Consistent Release Of The Power Activ+. Good Knight Power Activ+ System Is Absolutely Safe To Use Around Children And Family. It Ensures Complete Family Protection From Malaria, Chikungunya And Dengue-Causing Mosquitoes. Our Power Activ+ System Is Economical On Your Pocket As Well, With Refill Cartridges Available Separately In Various Packs, Ensuring More Savings