Baygon Cockroach Killer knocks down Cockroaches in less than 30 secs. Its Dual Active Formula with superior actives - Cypermethrin and Imiprothrin - kills cockroaches that may spread germs causing Cholera, Diarrhea and Typhoid. It keeps working for up to 4 weeks. Its has a new wand for special control application that helps reach tough corners killing even hidden cockroaches.