About Product:the Latest International Pyrethroids Are Used as the Original Medicine, and the Effective Ingredients Are Recommended by the World Health Organization (Wto), Which Is Environmentally Friendly, Safe and Hygienic. High-Quality Original Medicine and Solvent Are Used, Which Lasts for Expelling-Killing Mosquitoes and Has Strong Effect, and Is Mosquito-Free All Night Long.the Drug Effect Is Volatile and Stable, and the Effect of Each Bottle Lasts up to 300 Hours.