Product: Larger Protected Area and Low Power Consumption: This professional ultrasonic repellent is able to transmit sound waves in all directions. In addition, it is very energy efficient since it consumes only 3W. It protects homes, offices, warehouses, schools and hotels against the invasion of pests at all times. 100% Safe and Environmentally Friendly: No toxic agents are used and no radiation is emitted. This ultrasonic repellent is safe for children, pregnant women and pets. Compared to conventional insecticides, there is no risk of poisoning and it is a more environmentally friendly option.Inaudible to human or pet ears. This product is widely used in homes, warehouses, shops, hotels, hospitals, offices, computer rooms, gardens, hotel grain depots, etc. Specification: Size: 44*2 7.7*44mm Power: 3w Rated voltage: 90-250V Rated frequency: 22-65Hz Shell material: ABS Plug: UK Plug/EU Plug Package included: 2PCS/4PCS * Mosquito Repellent(as your choice)