Feature: 1. USB Rechargeable: The mosquito repellent bracelet adopts USB fast charging, charging for 30 minutes, standby for 6 months, and can work continuously for 7 days when fully charged. 2. 3 Gear Switching: The ultrasonic mosquito repellent bracelet adopts 3 gear switching, which is suitable for different scenes, and can be switched freely with one key. Effectively avoid more than 90percent of mosquitoes. 3. Adjustable Wrist Strap: You can adjust it according to the length of your wrist. This design makes the anti mosquito bracelet suitable for almost everyone. It is easy to carry and has a clock function. 4. Safe to Use: Ultrasonic insect wristband uses ultrasonic and physical methods to repel mosquitoes, no chemical additives, no noise, no odor, and is completely safe for the elderly, pregnant women, children and pets. 5. Applicable: This anti mosquito bracelet is stylish, lightweight, high end technology, suitable for birthday gift, mother"s day and father"s day gift, suitable for indoor and camping, fishing, hiking, sports, barbecue. Specification: Item Type: Ultrasonic Mosquito Repellent Bracelet Material: Plastic Battery Type: Built in 100mAh Lithium Battery (Included) Battery Life: 6 Months in Standby, 7 Days of Continuous Work when Fully Charged Function: Ultrasonic Mosquito Repellent, Electronic Watch. Package List: 1 x Ultrasonic Mosquito Repellent Bracelet1 x Charging Cable1 x ManualUSB Rechargeable: The mosquito repellent bracelet adopts USB fast charging, charging for 30 minutes, standby for 6 months, and can work continuously for 7 days when fully charged. 3 Gear Switching: The ultrasonic mosquito repellent bracelet adopts 3 gear switching, which is suitable for different scenes, and can be switched freely with one key. Effectively avoid more than 90percent of mosquitoes. Adjustable Wrist Strap: You can adjust it according to the length of your wrist. This design makes the anti mosquito bracelet suitable for almost everyone. It is easy to carry and has a clock function. Safe to Use: Ultrasonic insect wristband uses ultrasonic and physical methods to repel mosquitoes, no chemical additives, no noise, no odor, and is completely safe for the elderly, pregnant women, children and pets. Applicable: This anti mosquito bracelet is stylish, lightweight, high end technology, suitable for birthday gift, mother"s day and father"s day gift, suitable for indoor and camping, fishing, hiking, sports, barbecue.