1. Science proves that only the male mosquito is at breeding to expect would bite person and animal to feed its insect egg, however in this period, the female mosquito dislikes the male mosquito to contact it. This product thereby according to this principle, produces ultrasonic that simulating male mosquito sent out, attains a purpose of repelling mosquito that bits person.

2. Dragonfly is the natural enemy of mosquito, this product simulates the sound that dragonfly sent out when flapping wings to rise, attaining to repel each kind of mosquito thus.

Application: This product widely applies in family, dining-room, hotel, hospital, office building, storage, farm and other indoor place use.