Feature:1. 1. Work Principle: The bracelet achieves the effect of repelling mosquitoes by imitating the sounds that female mosquitoes hate, such as the sounds of male mosquitoes and dragonflies.2. 2. USB Charging: The bracelet is compatible with all USB output devices. Use USB charging cable to charge it.3. 3. Battery Capacity: Battery capacity: 80mAh, battery life of up to 150 hours.4. 4. Environmentally Friendly: Pure physical mosquito repellent, not drug repellent, safer, more environmentally friendly and harmless.5. 5. Wide Application: Suitable for the elderly, children, pregnant women and pets to use. The product can be worn indoor and outdoor (seaside, park, camping, mountaineering, fishing).Specification:Function: Mosquito RepellentInput: 5V/0.5AOutput: 34Hz-70KHzBattery capacity: 80mAhCharging time: about 30 minutesEndurance working time: 150 hoursColor: black, white, blue, pink.Note:Red light: charge indicator. Connect the charging cable. Blinking red indicates that the cable is being charged. When the cable is fully charged, the red light is steady on.Blue light: indication of mosquito repellent work. Press the button, the blue light is on, indicating that you are repelling mosquitoes. (The power is turned on in first gear, the blue indicator light is on, press the button again to switch the second gear; Press the button again to switch the third gear; Press the button again, power off, and the indicator goes off.)Package List:Mosquito Repellent Bracelet*1USB Cable*1Note:Due to the different monitor and light effect,the actual color maybe a slight different from the picture color.Please allow 1-2cm differs due to manual measurement.