Goodknight Gold Flash is India’s Most Powerful Liquid Vapouriser. It consists of a mosquito repellent cartridge (refill) and a clip-on electronic machine. This vapouriser system is powered by Gold Flash technology which has 2 modes - Flash and Normal Mode. Use Flash Mode when there are more mosquitoes, and Normal Mode 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. This pack contains 4 refills of Good knight Flash. Buy this Super Saver Pack and stay protected from mosquitoes. About the Brand: Good knight, a household name in India, is well known for its innovative household category products such as mosquito repellents, insecticides, personal and out-of-home protection products from mosquitoes, bugs and insects. From being pioneers in launching safe, natural ingredients smoke-free electronic mosquito repellents, they have introduced 12-hr jumbo coils, coil mats and many more technologically superior non-electric, non-skin application products to give complete protection to families without any worries.