NIUNIU Necessity - Is the uitrasonic pest repeller power bigger the better? No matter how powerful the power is, it will be weakened even useless because of wall. Insect repellent which more quantity and can cover every room enough is the best choice for major families Unique Technology - Mosquito repellent plug in using intelligently Bionic sound wave, it works by bionic sound wave only for various types of pests such as mosquitoes, flies, cockroaches, ants, mice, which directly affect their neurological auditory and immunity , keeps them away from home, office, house, warehouse, hotel Safety - The ultrasonic pest repeller plug in repels pest totally depending on physical way. Compared with the traditional repellent spray, those pest control ultrasonic pest repellers is much safer with the features of non-toxic, odorless and harmless to human and pets Easy to Use - The mosquito repellent are easy to use and very aesthetic appearance with the white surface. Just plug the mouse repellent into a socket, and the blue indicator light will be on once plugged in which the spider repellent can work all day Delivery Quantity: 4pcs, Package Contents: Only the above package contents, excluding other products. Size: 90x50x56mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: White (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)