1、The electronic mosquito repellent can produce ultrasonic waves. The unique ultrasonic affects the mosquito's hearing and nervous system, keeping them away from the area covered by ultrasound. 2、Safe and harmless, quiet mosquito repellent. The ultrasonic frequency band it emits is higher than the upper limit of human ear hearing, and it does not cause any harm to people and pets. 3、It adopts hook-type design, compact and portable, suitable for indoor and outdoor use. Mainly used for tourism, mountaineering, fishing, reading, camping, sports, gardening. 4、This product has a clock function. It is equipped with a small screen that can display the time and mosquito repellent gear, which is very convenient and intuitive when used outdoors. 5、The large battery capacity allows it to work for a long time. A full charge can be used for a long time or continuous standby without worrying about battery life. Item Type: Mosquito Repeller Material: ABS Effective Range: 5-10㎡ Battery: Lithium Battery 100mAh (Delivered with Battery) Frequency: 34Hz-70KHz 1 x Insect Repellent 1 x Charging Cable 1 x Manual