SAFETY EQUIPMENT: This rechargeable mosquito repellent bracelet is made of skin-friendly silicone material, non-toxic and harmless, contains no harmful substances, generates no odors or harmful substances, and is suitable for babies and adults.SAVING ENERGY: Built-in smart chip, intelligent operation with all-day low power consumption, energy saving. USB fast charging: charges every 30 minutes and can be used for up to 130 hours. Effectively get rid of 70-80% of mosquitoes.ULTRASONIC TECHNOLOGY: With biological sound waves (ultrasound + bionic waves) and double-wave ring superimposed reproduction, you can imitate the sound of female mosquitoes (male mosquitoes and cockroaches) to achieve mosquito repellent.SUITABLE: Suitable for the elderly, children, pregnant women and pets. The product can be worn both indoors and outdoors (sea, park, camping.WIDE APPLICATION: Our mosquito repellent bracelets are small and comfortable to wear. If you go on vacation or do outdoor activities often, this can be a special occasion. It is perfect for vacations, outdoor dining, hiking, camping, jogging or fishing.