Good Knight Gold Flash Machine Plus Refill (45 ml) All electronic mosquito repellent machines may utilize the Good Knight Gold Flash Mosquito Repellent Refill, although the Good Knight Activ+ Machine is the ideal device to use it with. It shields you and your loved ones against illnesses spread by mosquitoes. Its sophisticated mixture destroys the insects while having no influence on human health. All day, keep the mosquitoes out of your home. So go ahead and get this item right now online!