Non-toxic, safe and environmentally friendlyThis rechargeable mosquito repellent bracelet uses skin-friendly silicone, which is non-toxic, odorless, and has no added chemicals, suitable for babies and adults. This mosquito repellent bracelet can keep those annoying mosquitoes away, thereby protecting your skin from being bitten, does not contain harmful chemicals, safe and healthy. The adjustable strap is suitable for most people.Bionic mosquito repellentThis mosquito repellent bracelet uses biosound waves (ultrasonic bionic waves). Most leeches are female mosquitoes. The bracelet imitates the unpleasant sounds of female mosquitoes, such as the sounds of male mosquitoes and cockroaches. The updated version is equipped with the function of displaying time and body temperature.Smart TechnologyBuilt-in high-quality smart chip, 30 minutes USB fast charging (when charging, remove the bracelet host), 30 days standby time, the mosquito repellent bracelet can be used for 130 hours after being fully charged. Note: The time needs to be reset after full discharge, and it is recommended to charge before the battery is exhausted.Multiple application scenariosMultiple mosquito repellent modes meet your different needs. Press the power button once to turn on the switch and enter the internal mode. Double-click to switch to outdoor sports mode; press three times to enter the quietest mode, suitable for sleeping; press four times to turn off the device. Click the time display button to display the time.Effective anti-mosquitoGreat for indoor and outdoor activities. Provides up to 130 hours of protection against mosquito bites. Great for outdoor activities such as outdoor camping, running, traveling, fishing, barbecue, gardening, picnics, golf and even simple outdoor barbecue. Note: Waterproof for daily life, but no submersion in water