... harm for man Repel mice,beetle,mosquito,flea,fly,cric ultrasonic mosquito killer factory Product DescriptionUseful area: 50- ... 2. This machine can lustrate house mouse, black beetle, mosquito, flea, fly, cricket, ant, wood ant etc ... the wall, you can see the blue indicator light and the machine begin to work. Also ... you turn it to H, it can lustrate mosquito, black beetle etc small vermin. When you turn ...