【Safe, non-toxic, and environmentally friendly】This rechargeable mosquito repellent bracelet is made of skin-friendly silicone, is non-toxic, odorless, and contains no added chemicals, suitable for babies and adults. This mosquito repellent bracelet can keep annoying mosquitoes away and thus protect your skin from bites, without harmful chemicals, safe and healthy. The adjustable strap fits most people. 【Biosonic Mosquito Repellent】This mosquito repellent bracelet uses biological sound waves (ultrasonic bionic waves). Most bloodsuckers are female mosquitoes. The bracelet imitates the unpleasant sounds of female mosquitoes, such as male mosquitoes and cockroaches. The updated version has a time display function. 【Intelligent Technology】Built-in high-quality intelligent chip, 30-minute USB fast charging (remove the host from the bracelet while charging), 30 days standby time, the mosquito repellent bracelet can be used for 130 hours after a full charge. Note: You need to reset the time