DASHUHUWAI (TM) 2 pcsEU Plug White Electronic Ultrasonic Widely-used Pest Mouse Bug Repellent Mosquito Repeller Ultrasonic Anti Mosquito Insect Pest Repellent Repeller EU plug Voltage: 110 - 220V To increase the effect, you should use several sets machine at the warehouse or goods pile-up, several rooms This product is widely used in family, warehouse, shops, hotels, hospitals, offices, rooms, gardens, hotels, grain depot, etc. 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 Dont drop the machine and make strong striking on it