1. Upgraded frequency Enhancement: This ultrasonic insect repellent is an upgraded version of the ultrasonic insect repellent, with an enhanced frequency that is higher than that of ordinary insect repellents on the market. It adopts advanced ultrasonic technology. Its nervous system interferes with spiders, mosquitoes, cockroaches, ants, flies, insects and fleas, making them feel uncomfortable and forcing them to leave. 2. Anti-flea and anti-lice for dogs, cats and pets: Just hang a portable insect repellent on your dog, cat or pet to repel fleas, lice, fleas and other insects, which can help your pet stay away Skin problems. 3. Long-term outdoor protection guarantee: Ultrasonic mosquito repellent provides long-term protection against mosquitoes. It is a must-have for all outdoor activities, especially camping, hunting, climbing, running, hiking, traveling, fishing, barbecue, gardening, picnic, golf, and even simple barbecue cooking. 4. Harmless and environmentally friendly: Ultrasonic mosquito repellent is a safe and environmentally friendly pest control solution. No chemicals, no toxicity, no peculiar smell, no radiation, no noise, safe for your family and cute dogs or cats. 5. Convenient and portable: This outdoor portable insect repellent has a large-capacity battery. The outdoor mosquito repellent can continue to work for 7 days. It can be charged by Micro USB without plugging in. You can carry it with you to protect you from mosquitoes or other insects. The best partner for camping or traveling. Comes with a rope, you can hang it around your neck or around your neck. Put it in the bag.