Ultrasonic technology: With ultrasonic chips designed, humans can't hear the ultrasonic waves, but they can confuse and agitate pests and even drive them away. Effectively repels mice, mosquitoes, ants, cockroaches, spiders, insects, rat fleas. Lightweight Design: Ultrasonic expeller is portable and easy to carry. You just need to string it through the keyhole and hang it around your neck, or hang it on your bag, and you can easily carry it anywhere. Good protection for pets: It can effectively repel fleas and ticks on pets using ultrasonic waves, and will not cause any harm to your pets because it is non-toxic, odorless, and chemical-free. It provides useful health protection for pets. COMPLETELY SAFE: Ultrasonic repellents are absolutely free of toxins, chemicals, or even fragrances of any kind - you and your family will never hear about it Here's a safe pest control for children and pets you'll have. Versatile: Effectively protects you from mosquitoes, cockroaches, ants, mice and other pests. It is the best companion for climbing, fishing, golfing, hiking, biking, traveling and camping. product description: Dimensions: 5.8 x 4 x 2 cm. Specification: This ultrasonic repellent uses advanced ultrasonic technology to disrupt the nervous systems of spiders, mosquitoes, cockroaches, ants, flies, insects and fleas, making them uncomfortable and forcing them to leave. Effective against all pests: mice, insects, bed bugs, fleas, insects, rodents, cockroaches, mosquitoes, ants, spiders, mice, fruit flies, etc. Portable insect repellent is chemical-free, non-toxic, odorless, radiation-free, noise-free, and safe for your family and your lovely dog or cat. It repels insects or rodents instead of killing them, so no nasty carcasses are left for you to clean up. This Ultrasonic Mosquito Repellent is lightweight so you can take it with you wherever you go to protect yourself from mosquito bites or other insects. This rechargeable electronic mosquito repellent is your best companion while camping or traveling. With a string and key ring, you can hang it around your neck or on your bag. How to use: Press and hold the button for 3 seconds and the red light flashes once to turn it on, and a slight ultrasonic sound will be heard when it is turned on. To turn off the device, you must press and hold the button for 5 seconds and then see thered light flash twice. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin