Inverter Mosquito Repellent: The bracelet forms a protective barrier by emitting three-frequency, variable-frequency sound waves that interfere with mosquitoes' hearing and nervous system, making them uncomfortable and staying away to achieve the effect of repelling mosquitoes Save time and energy: Ultrasonic wristband, built-in smart chip, USB fast charging, only needs 30 minutes charging time, can continue to work for a week, to meet long-time mosquito repellent needs Humanized design: The mosquito repellent bracelet can also be used as an electronic clock to show the time. It is equipped with a soft and skin-friendly silicone strap, the length of which can be adjusted for comfortable wearing according to the size of the wrist Safe and reliable: Pure physical mosquito repellent bracelet, chemical-free, non-toxic and harmless, no impact on the human body, healthy and environmentally friendly, very suitable for children, adults and the elderly Use any Or: The mosquito repellent bracelet effectively repels mosquitoes, can protect you and your family from mosquito bites all day long, whether indoors or outdoors, home, office, camping, hiking, fishing, etc.