Description: This ultrasonic pest repellers utilize a high-pressure ultrasonic sound that is higher than the human hearing range to keep insects and rodents away from its coverage. Once you turn on the device, it starts broadcasting an irritating sound at frequencies audible only by rodents and other crawling pests. Since humans are unable of hearing sounds within that frequency range, it seems like nothing is happening, but the small device is really doing its magic! Can be used for various occasions: Home, office environment, warehouses, supermarkets, hospitals, granaries, rooms, hotels. Specifications: Type:Ultrasonic Insect Repellent Name:Ultrasonic Insect Repeller Input Voltage: 90-250V Rated Frequency: 50~60Hz Input Frequency: 25~65Hz Output Power: 4~6W Output Audio: 20-55KHz Using Environment Temperature: 0~40 With built-in LED Night Light How to use? 1. The machine should be installed in the 20-80 from the ground centimetres, requirements of vertical to the ground surface is inserted into the power socket 2. Mounting points should be avoided as far as possible, carpet, curtains and other sound-absorbing material, in order to prevent pressure reducing the domain becomes small and effect 3. Using the former days, if it is found that the mice, pests and other activities increased significantly, is a normal phenomenon. Because usually hide in the nests of rodents and pests by ultrasonic wave after the attack,in succession Escape from its original place to hide 4. Do not use strong solvent, water or wet cloth clean body, pay attention to Moisture-proof, waterproof. 5. The use of the environment temperature:0-40 degrees Celsius, do not let this machine is strongly affected by the impact or fall. Package Includes: 2/4/6/8x Ultrasonic Pest Repeller