Ultrasonic Mosquito Repellent Night Light uses mirrored sound waves to produce sound. The sound hole is located on the back of the product, and uses the principle of preventing sound wave reflection to form a mirror sound wave. It makes sound waves propagate better and has the effect of reducing noise.We upgraded to adopt a smaller and thinner ceramic sound wave board, and use the principle of mirror sound to increase the repelling effect by 50%, so there is basically no noise, mosquito repellent, and does not affect sleep.We are not ordinary night lights. The of night light is bright and the diffused is , which will inhibit the body's pineal gland from secreting , which is one of the important factors to people's sleep quality. The MITO ultrasonic mosquito repellent night light uses 56 lamp beads in the entire lamp, and the arrangement with ultra-low diffusion Less than 120 will not interfere with sleep.Automatic lighting management system. During the day, the lights are off, and at night, the lights are automatically turned off. Save no more than 1 kWh per month for environmental protectionColor: BlackMaterial: PlasticPlug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on.Voltage: AC110VPackage Contents:2 x Mosquito repellentOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.