[Physical Mosquito Repellent] The bracelet uses bio-imitation waves, which can effectively repel 70%-80% of mosquitoes. Various effective sound wave frequencies are written into the chip to repel mosquitoes. The physical repellent effect is remarkable. [Removing the strap] The detachable mosquito repellent strap can be separated, and it can be used alone without the strap. The side is made of high-grade pearl powder material and feels comfortable. [Dustproof and waterproof] It can effectively prevent water washing when washing hands in rain (cannot be directly immersed in water), avoid damage, and help protect the bracelet. You don't have to worry about water entering the bracelet when it rains. [Wear the lanyard] It is safer, safer, more environmentally friendly, and healthier for the elderly, children, and pregnant women. [Wide use] Whether you are camping, fishing, hiking or shopping in the park, the smart mosquito repellent bracelet is the best mosquito repellent. Specification: Product name: Ultrasonic Mosquito Repellent Watch Product material: silicone Product function: ultrasonic mosquito repellent. Product input: 5V/1A. Product output: 34Hz-70KHz Charging time: about 30 minutes Life time: 150 hours