Description: Pure physical mosquito repellent, non chemical mosquito repellent, safer, safer, more environmentally friendly, and healthier. Suitable for the elderly, children, women and pets. The product can be worn indoors and outdoors (seaside, park, camping, climbing, fishing). The wristband simulates the nuisance of female mosquitoes (such as the sounds of male mosquitoes and dragonflies) to repel mosquitoes and protect you from mosquito bites. Battery capacity 80mAh, battery life up to 150 hours, long battery life, you can use it for a long time. The bracelet is compatible with all USB output devices. Use a micro USB charging cable to charge it, very convenient. Specification: Function: Sonic mosquito repellent Input: 5V / 0.5A Output: 34Hz-70KHz Battery capacity: 80mAh Charging time: about 30 minutes Endurance working time: 150 hours Product color: black, white, blue, pink(optional) Single package size: 32 * 52 * 78mm Package Includes: 1 x Mosquito Repellent Bracelet 1 x Charging Cable 1 x User Manual