Good knight Flash is India’s Most Powerful Liquid Vapouriser. It consists of a mosquito repellent refill and clip-on electronic mosquito repellent machine. This vapouriser system is powered by Gold Flash technology that has 2 modes - Flash and Normal Mode. Flash Mode can be used when there are many mosquitoes and Normal Mode is used when there are less mosquitoes. Visible powerful flash vapours instantly spread across the room and drive away mosquitoes, even the hidden ones. Flash mode releases visible vapours for 30 minutes every 4 hour, providing you and your family superior protection against mosquitoes. It is absolutely safe to use the mosquito repellent machine around children and family.