Good Knight Gold 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.