6-band ultrasonic infinite loop scanning (13-25KHZ/26-35KHZ/36-45KHZ/46-55KHZ/56-65KHZ/66-75KHZ)Variable band returns every 2 seconds, all frequencies work togetherThe working area is about 10-60 square meters, whether you are at home or traveling, it can effectively repel mosquitoesWidely suitable for all outdoor activities, especially for camping, hunting, mountaineering, running, hiking, etc.Safer for children and pets, human and household pets can't hear ultrasound, harmful and dangerous eco-friendly alternativeBuilt-in rechargeable 100mA Li-polymer battery, recharges via USB cable included in the packageWith hooks, it can be hung on the bed, waist or stroller for easy portabilityPackage includes: 1 x Ultrasonic Mosquito Repellent+1 x USB Cable+1 Hook