It's ingenious combination of mosquito repellent and night light,this insect repellent can give off soft light in the dark and it can also repel mosquitoes,it has two brightness level and you could use the night light switch to adjust the LED brightness.Theintelligent night light of this ultrasonic pest repeller builds a stable and comfortable environment for you,warm yellow light provides better protection for you and your family's sleep. This mosquito repellent is an eco-friendly products and contains no odor.It's safe for human,use a specific ultrasonic frequency in which only insects,pests and rats can identify to repel mosquitoes.Physical ultrasonic wave mosquito repellent, rejectharmful chemical substances, 24 hours silent guard, not miss every mosquito.Designed for mother and baby, the baby will not be disturbed by mosquitoes, the mother is more assured. Just plug the ultrasonic pest repeller in power sockets or outdoor socket without any tools,it will start to repel the pests when you notice the orange night light is on.One ultrasonic pest repellent is effective for an area 15~30,recommended to plugthe ultrasonic pest control repeller at between 30-50 inches away from the floor for flying pests and 10-30 inches from the ground for crawling pests and rat. Expulsion is a continuous process, from the beginning of the impact continue to cause interference reduce the possibility of survival prevent mosquitoes and rats from moving back.Note that our ultrasonic pest repeller work between 3 and 4 weeksto make an effect depending on the amount of infestation,please wait patiently and insist on use. The mosquito repellent is very easy to carry and won't take up much space in your suitcase,it can be used in a variety of situations such as home, hotel, office, warehouse, store etc.Recommend you install one pest repeller for each room because the ultrasoundcannot penetrate walls and solid objects.