Features:Work by continuously transmitting a powerful range of ultrasonic sound waves that drives away pests.Non-toxic and harmless to humans and pets, an alternative to toxic chemicals and dangerous traps.Protects an area up to 120-150 square meters if there is an open space.Just plug in the socket, easy and convenient for use.LED light indicates that it is currently working.Low power consumption, suitable for long time operation.Does not interfere with the operation of radio, television or other electronic equipment.Notice:1. This machine should be installed at 30cm away from the floor. And vertical to the floor and plug to the power socket.2. The installing point should be avoided to be in the back of the curtain, fridge, and any other furniture that deterring or attaching frequency.3. It’s normal that the mouse and vermin will increase at the beginning of the using days. Because they are moving away from their living place after the attack of ultrasonic.4. Don’t clean the machine by strong impregnant, water or damp cloth. Use dry and soft cloth with some neuter wash to clean it.5. To increase the effect, you should use several sets machines at the warehouse or goods pile-up, several rooms.