Intelligent ultrasonic mosquito repellent: This ultrasonic mosquito repellent bracelet has a certain frequency of sound (the sound of male mosquitoes or dragonflies), 360 environmental interference, more environmentally friendly, healthy, safe and non-toxic, imitating baby mosquito repellent. You can use it with confidence Safe and energy-saving: Built-in smart chip aluminum polymer battery, as well as power optimization management system, safe and energy-saving, long battery life, low power consumption operation, recharged once a day, sustainable operation for 6 months or 7 days, effectively repels 90% of mosquitoes Mode: This mosquito repellent bracelet features a 3-block drive design. When turned on, the first gear is for daily indoor use, the second gear is sports mode, and the third gear is outdoor mode. You can choose the right gear based on your needs. USB mosquito repellent wristband: detachable mosquito repellent strap design, can be used alone, both sides are made of soft TPU material, gentle and skin-friendly, comfortable to wear, the length can be adjusted freely, reusable mosquito repellent bracelet Wide application: This mosquito repellent strip is waterproof and effective in repelling mosquitoes for children and adults. Whether indoors or outdoors, camping, fishing, hiking, sports or barbecue, it is perfect for spending a comfortable summer