Electronic Helminthes Machine Repellent Mosquitoes Pest (White) + Worldwide free shiping This machine will have great effect in 50-80 square meters in the room. This machine can lustrate house mouse, black beetle, mosquito, flea, fly, cricket, ant, wood ant etc vermin. So we can call it electronic lustrate mouse machine, electronic helminthes machine etc. The ultrasonic that sent out from this machine is far away from hearing range of human being. They will not do harm to human being and pets. Also will not have affect on house machine.