Upgraded Version & Upgraded Frequency: This item is an upgraded ultrasonic repeller with upgraded frequency, which is higher than normal repeller in the market. Uses advanced ultrasonic technology to interfere spiders, mosquitoes, cockroaches, ants, flies, insects and fleas with their nervous system, making them uncomfortable and forcing them to pass. And they won't come back. Convenient and Portable: Large battery capacity, the outdoor mosquito repellent can work for 7 days, micro USB charging, no plug-in needed, you can take anywhere you go, protect yourself against mosquitoes or other bugs. Companion for camping or traveling. With a rope, you can hang around your neck or hang on your bag. Flea and Tick Prevention for Dogs, Cats, Pets: Just hang portable repellent on your dog, cat or pet capable of repelling fleas, ticks, lice, chiggers and other insects, this way helps your pet rid skin of problems. Long-lasting exterior protection guaranteed: the ultrasonic mosquito repellent provides long hours of protection against mosquito bites. is an essential for all outdoor activities, especially for camping, hunting, mountaineering, running, hiking, traveling, fishing, barbecues, gardening, picnics, golf and even simple barbecues. Keep Mosquitoes Away and Enjoy Outdoor Happiness SAFE AND ENVIRONMENTALLY FRIENDLY: The ultrasonic repeller is a safe and environmentally friendly pest control solution. No chemicals, no poison, no smell, no radiation, no noise, 100% safe for your families and lovely dogs or cats. Flush out bugs or rodents instead of killing them, so bad corpses aren't left to clean up.