Tips: 1.To ehance the performance, this device should be installed 10-30inch away from the floor vertical to the floor, and no other obstacles around within 1 meter. 2.In order to use the best effect of the device, install the repeller away from sound-absorbing materials such as carpets, floor mats, and curtains as far as possible. 3.In the first few days of using the repeller, it's normal to see the pests appear in your home. Do not panic! They are just trying to move out of your home. 4.The repeller covers up to 1200 square feet of space. Please use more than one device in larger rooms.