Features: 1.Physical Mosquito Repellent: Electric mosquito wristband uses ultrasonic and physical methods, no chemical additives, no noise, no odor, safe for the elderly, pregnant women, children and pets. 2.3 Speeds Switching: Ultrasonic mosquito repellent bracelet effectively avoid more than 90 percent of mosquitoes. Three speed switch for different scenes, one key switch. 3.Adjustable Design: The mosquito repeller wristband can be adjusted according to the length of the wrist. This design makes mosquito repellent watch suitable for almost everyone. Easy to carry. 4.Long Standby Time: The ultrasonic mosquito repellent bracelet uses USB fast charging, 30 minutes of charging, 6 months of standby, and 7 days of continuous operation after a full charge. 5.Widely Used: The mosquito repellent bracelet is stylish, lightweight, and the perfect gift. Suitable for indoor, camping, fishing, hiking, sports, barbecue, etc. specification:Item Type: Mosquito Repeller Wristband Material: Plastic Battery Type: Built in 100mAh Lithium Battery (Included) Endurance Working Time: Standby 6 Months, Fully Charged Can Work Continuously for 7 Days Function: Ultrasonic Mosquito Repellent PackageList: 1 x Mosquito Repeller Wristband 1 x Charging Line 1 x Manual