Ultrasonic Mosquito Repellent Bracelets Watch Adjustable Silicone Wristbands Outdoor Bracelets for Kids & Adults Non-Toxic Natural (2Pack M2 Beige Watch)

Ultrasonic mosquito repellent devices operate on the principle of acoustic repellency. They generate high-frequency sound waves, usually between 20 to 60 kHz, which are above the range of human hearing (hence "ultrasonic"). 1:Predator Mimicry: Many devices emit frequencies that imitate the wingbeat sounds of male mosquitoes or natural mosquito predators like dragonflies. The intent is to scare away female mosquitoes (which require a blood meal for egg development).  2:Mating Disruption: Some are designed to replicate the wingbeat frequency of male mosquitoes, with the aim of confusing and repelling pregnant females seeking to mate, as they would avoid repeated mating attempts.

• Mosquito repellent principle: Our ultrasonic wristband has three gears. Generate ultrasonic waves ranging from 20 to 60 kHz, mimicking the sounds of male mosquitoes and dragonflies, to scare away female mosquitoes and achieve effective mosquito repelling.
• Ultrasonic mosquito repellent, natural protection, free of mosquito repellent, safe for pregnant women and children to use.Waterproof, suitable for children and pregnant women.
• Adjustable wristbands for children and adults: Our mosquito wristband features a soft, adjustable strap that can be easily adjusted to fit any wrist size, ensuring comfortable wearing for both children and adults.
• Waterproof & Durable: Designed for outdoor enthusiasts, these mosquito band are waterproof, making them ideal for swimming, hiking, camping, and other adventures. Enjoy reliable mosquito protection in any weather.
• USB Charging Long lasting Mosquito Protection: Each mosquito wristband can be used for a week on a single charge, providing reliable and continuous mosquito protection, ensuring your safety day and night. Perfect for camping, hiking, swimming, picnicking, and all outdoor activities - say goodbye to the annoyance of mosquitoes