1.manual mini spray gun or killing mosquito; 2.plastic and cheaper. 3.easy to operated any where. 4.kill the mosquito. 1), effectiveness, killing the mosquitoes, flies, roach, ants strongly2), Plastic,small size make freight very cheap.3), safety, it is safe for people and dangerous for insects4), environmental protect, no pollution to surroundings, Mini sprayer gun for killing mosquito