Non-toxic, safe, and environmentally friendly. This rechargeable mosquito repellent bracelet is made of skin-friendly silicone, is non-toxic, odorless, and contains no added chemicals. It is suitable for both babies and adults. This mosquito repellent bracelet keeps annoying mosquitoes away, protects your skin from bites, contains no harmful chemicals, and is safe and healthy. The adjustable band fits most people. This mosquito repellent bracelet uses biosonic waves (ultrasonic bionic waves). Most bloodsuckers are female mosquitoes. This group imitates the unpleasant sounds of female mosquitoes, as well as those of male mosquitoes and cockroaches. The updated version is equipped with a time display function. . Intelligent Technology: Built-in high-quality intelligent chip, 30-minute USB fast charging (the host is connected to the arm during charging), 30 days of standby time, the arm has an anti-mosquito function, and the fully charged battery can be used over 130 times. Note: If the