Color and Size: Upgrade Ultrasonic Pest Repeller: The Ultrasonic Pest Repeller uses high-tech to generate frequency pulses of pest sensitive bands, attacking their nervous system and hearing, making them unable to continue their activities, thereby achieving effect to the insect.Like spiders, mice, mosquitoes, rats, roaches, ants, snakes and so on. Environmental Friendly : This pest control ultrasonic by this ultrasonic pest repellent only affects the pests and inaudible to human and pets. It will not cause any harm to pregnant women, children, babies or even pets.Very friendly to the environment. Easy to Use: Simply plug ultrasonic bug repellent in the electrical outlet then it start working when you notice the blue light is on (provide a soft blue glow at night). It cost little electricity and no need to clean up pests. Wide Coverage:The Ultrasonic Pest Repellent is effective for an area up to 100~150 Square Meters. This product is used in homes, warehouses, shops, hotels, hospitals, offices, rooms, gardens, hotels, etc. Instructions for Use: That ultrasonic waves cannot travel through walls.For best results,we suggest use 1 unit per average-sized room with a pest problem. Additional units will be required in larger areas. Areas such as attics, basements, garages and large storage areas may require more than one unit.Product number: X1263 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store