Description:-Intelligent ultrasonic repellent bracelet.-Fast charging, standby mode for long battery life.-Simulate specific sound frequencies and remove mosquitoes.-Effectively drive 70% to 80% of mosquitoes.-Fasting charging, charge one for 130 hours.-The bracelet can repel mosquitoes by mimicking the disgusting voices of female mosquitoes such as male mosquitoes and dragonflies.-It is safer, safer, safer, more environmentally friendly and healthier. -Mature, children, pregnant women and pets can be carried.-Portable products can be worn indoors and outdoors (seaside, park, camping, mountaineering, fishing). Specification:-Input: 3.7V/1A-Output: 34Hz-70KHz-Battery Capacity: 70mAh-Charging Time: About 30 minutes-Duration Time: 130 hours-Size: Approx. 25x3x 1cm/9.84x1.18x0.39inchPackage Included:1 Piece Bracelet1 Piece Charging Cable1 Piece User ManualNote:Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Please compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leave a message before you give bad feedback if the products have some problems. Thank you for your understanding.