Features: 1.Physical Mosquito Repellent: Mosquito wristband watch uses ultrasonic and physical methods, no chemical additives, no noise, no odor, safe for seniors, pregnant women, children and pets. 2.Efficient, 3 Speeds: Mosquito repellent watch bracelet effectively avoid more than 90 percent of mosquitoes. Three gears switch, suitable for different scenes, one button switch. 3.Adjustable Length: Mosquito repellent watch bracelet can be adjusted according to the length of your wrist. Suitable for everyone. With time display function and temperature measurement function. 4.Long Standby Time: Ultrasonic mosquito repellent bracelet watch adopts USB fast charging, charging 30 minutes, standby 6 months, fully charged can work continuously for 4 days. 5.Widely Used: Ultrasonic mosquito repellent bracelet watch is stylish, lightweight and the perfect gift. Suitable for indoor, camping, fishing, hiking, sports, barbecue, etc. specification:Item Type: Mosquito Repellent Watch Material: Plastic Battery Type: Built in 100mAh Lithium Battery (included) Endurance Working Time: Standby 6 Months, Fully Charged Can Work Continuously for 4 Days Function: Ultrasonic Mosquito Repellent, Electronic Clock, Temperature Measurement PackageList: 1 x Mosquito Repellent Bracelet 1 x Charging Line 1 x Manual