Ultrasonic mosquito repellent electronic wristwatch with USB charging/waterproof/reusable/portable, for children and adults (improved version) (black)

Non-toxic and safe - This rechargeable mosquito repellent bracelet uses skin-friendly silicone, is non-toxic and harmless, contains no harmful substances, produces no odor or harmful substances, and is suitable for infants and adults.

Ultrasonic technology - Using biological sound waves (ultrasound + bionic waves), the double-wave ring overlaps the sound playback, mimicking the sound of female mosquitoes (male mosquitoes and cockroaches), thus achieving mosquito repellency.

USB smart charging mosquito repellent bracelet, built-in smart chip, USB fast charging, 30-minute charge, 30-day standby time, 130 hours of use, saving time and hassle, effectively repels over 80% of mosquitoes.

Multi-mode selection - Press once to turn on the switch to start indoor mode; press again to switch to outdoor sports mode; press a third time to activate silent sleep mode. Press a fourth time to turn off the device. Widely used - this mosquito repellent bracelet is stylish and lightweight, making it ideal for indoor use, camping, fishing, hiking, sports, or barbecues. It can protect you and your loved ones from mosquitoes, allowing you to enjoy a perfect summer.