Ultrasonic Mosquito Repellent Bracelet - Smart Electronic Mosquito Repellent Bracelet, Quiet Ultrasound, Creating Sound Barrier, Physical Principle Repellent, Non-Chemical Repellent, Safer, More Environmentally Friendly, Safer, More healthy, the elderly, children and pets can be worn, portable, and worn indoors and outdoors. USB Charging and Reusable - Built-in polymer battery aluminum, charge for 30 minutes, work for 130 hours, save money and trouble. Sleek and lightweight, black and white, stylish and portable, with a soft strap. Safety Mosquito Repellent Bracelet - Made with safe materials, eco-friendly, non-toxic, safe, safe for children and adults. Whether you are indoors or outdoors, our mosquito repellent bracelet protects you from mosquitoes. Adjustable Function - The bracelet has three settings. Generally, it can be used indoors. Adjust a speed. In outdoor activities, set the second gear. It is the silent mode of the bracelet, and the third gear can be adjusted. Carrying - The mosquito repellent bracelet can be worn on the wrist, you can connect it to the backpack, to the the stroller for convenience, waterproof, and will not affect your daily life.