Application: indoor,such as family, restaurants, hotels, hospitals, office buildings, warehouses,etc AR131 Driving Mosquitoes and Cockroaches. Type: AR131 Size: 110MM*75MM Material: Organic synthetic plasticColour: Gray-White Brief:1.Application: indoor,such as family, restaurants, hotels, hospitals, office buildings, warehouses,etc. ultrasound wave is effective in the range of 120 square meter; ...