Features: 1.USB FAST CHARGING: Mosquito repellent watch uses USB fast charging, charging 30 minutes, standby 6 months, fully charged can work continuously for 7 days, effectively avoiding more than 90% of mosquitoes. 2.ULTRASONIC METHOD: Mosquito wristband uses ultrasonic and physical methods to repel mosquitoes without chemical additives, no noise, no odor and is completely safe for seniors, pregnant women, children and pets. 3.3 GEARS SWITCHING: Ultrasonic mosquito repellent watch preserves you and your loved ones from mosquitoes and enjoy a perfect summer. Three gears switching, suitable for different scenes. One key can switch freely. 4.ADJUSTABLE DESIGN: Mosquito repellent watch can be adjusted to fit the length of your wrist. This design makes the anti mosquito bracelet suitable for almost everyone. Easy to carry with time display function. 5.STYLISH AND LIGHTWEIGHT: Ultrasonic mosquito repellent bracelet is stylish and lightweight, suitable for birthday gift, Mother's Day and Father's Day gift, suitable for indoor, camping, fishing, hiking, sports, barbecue, etc. specification:Item Type: Ultrasonic Mosquito Repellent Bracelet Material: Plastic Battery Type: Built in 90mah Lithium Battery (included) Continuity Working Time: Standby 6 Months, Fully Charged Can Work Continuously for 7 Days Function: Ultrasonic Mosquito Repellent, Electronic Clock PackageList:1 x UltrasonicMosquitoRepellentBracelet 1 x Charging Cable 1 x Instruction Manual