Features: [Ultrasonic]The pest repeller use ultrasonic work to disorientate the hearing and nervous system of pests to quickly and powerfully drive them away. [Night Light]Light-sensitive night light, automatically turns off when the surrounding is bright, and automatically turns on when the surrounding is dark. [Quite]There are no zapping noises to wake you from your sleep or bother your guests. [Portable]This mosquito repeller comes in a practical design, the small dimensions allowing you to carry it anywhere you need it. [Widely Applicable]It can drive away from most types of flying and crawling pests such as mosquitoes, spiders, bed bugs, fruit flies, mice, etc.