Feature 1 The anti-mosquito bracelet is made of safe materials, environmentally friendly, non-toxic and safe to use. The strap is designed with holes and is highly flexible for all ages. 2 Mosquito Repellent Bracelet is colorless, odorless, chemically free, mimicking the wings of male mosquitoes, resisting female mosquitoes, and scientifically designed to promote your life. 3 The anti-mosquito bracelet is very lightweight and durable, so you can carry your bracelet with you, so that you can say goodbye to those nasty mosquitoes and provide you with long-term protection. 4 USB charging, durable to use. 5 Anti-mosquito bracelets have a wide range of applications for outdoor and indoor, sit-in fishing, parks, summer camps, hiking, and to prevent those annoying mosquitoes. This is the best gift for family and friends. 6 7 Product Name: Ultrasonic mosquito repellent bracelet Function: Ultrasonic mosquito repellent Applicable age: 3 years old or older Waterproof: waterproof Input: 5V/1A Output: 34HZ-70KHZ Battery capacity: 90mAH Charging time: about 30 minutes Life time: 130 hours The principle of mosquito repellent: the bracelet rings to imitate the sounds of female mosquitoes, such as the sound of male mosquitoes and cockroaches, to achieve mosquito repellent effect. In nature, blood sucking are female mosquitoes, and they are all in the stage of conception, in this price range, Female mosquitoes will avoid male mosquitoes and avoid secondary pregnancy. So the sound of male mosquitoes can reach the mosquito repellent effect.Package List1* mosquito repellent bracelet 1*USB cable