... ,no harm for man Repel mice,beetle,mosquito,flea,fly,cric ultrasonic mosquito killer factory Product DescriptionUseful area: 50-80 square ... beetle, mosquito, flea, fly, cricket, ant, wood ant etc vermin. So we can call it electronic lustrate mouse machine, electronic helminthes machine ... the machine begin to work. Also you can hear electronic scanning sound from high frequency to low frequency. The ...