1. work effectly in the room of 60-80meter 2.can drive fly, mosquito,and mouse. 3.It is safe ,environmental-protective odorles Safe+protective product introductions:1.It can work effectly in the room of 60-80 square meters.2.It can drive fly, mosquito,and mouse.3.The ultrasonic waves that it emits have no damage to the human beings and the household pets.Besides,It has no interference to the ...