[Ultrasonic]Wristband uses high frequency, unobtrusive soundwaves to create a sonic barrier that protects you from mosquito bites. [Non-Toxic]Say goodbye to messy, oily mosquito creams and sprays, this sonic wristband keeps mosquitoes away without harmful chemicals, and non-toxic to use in daily life. [Adjustable Length]Mosquito repellent bracelet is fully adjustable, each hole easily fits, making it perfect for adults and kids. [Widely Applicable]Pest control bands are perfect for outdoor activities or indoor use, like traveling, gardening, BBQ, hiking, fishing, etc. [Great Gift]The wristband is the perfect gift for outdoor adventurers, it protects loved ones from mosquitoes.