Ultrasonic repeller uses the advanced technology, which can produce frequency conversion ultrasonic wave to affect auditory and nervous system of mice, mosquitoes, cockroaches and other pests and cause neurological disorder, loss of inappetence and mental fatigue, thus fleeing the scene. It can be widely use in houses, hotels, restaurants, warehouses, supermarkets, offices and more. Note: 1. Pests may be active and disorderly about 3-5 days after use, it’s normal and you can see obvious effect after 2-3 weeks. Allow the Pest Repeller to operate continuously for best results. 2. The repeller should be installed at 80-120cm away from the floor and vertical to the floor. 3. The repeller should not be plugged around carpets, curtains, etc. 4. Clean it with dry and soft cloth instead of b impregnant, water or damp cloth. 5. Size and color may be slight different beacuse of manual measurement and different light conditions, please in kind prevail. Thank you. Specifications: Color: White