Description: Product Name: Sonic Mosquito Repellent Watch Item model number: M70 Function: Sonic mosquito repellent Input: 5V/0.5A Output: 36Hz-68Hz Battery capacity: 100mAh Charging time: about 30 minutes Battery life: 150 hours Product color: black.white. Single package size: 35*55*92mm Weight of the whole machine (including packaging): 37.5g Specifications: 1. No Radiation: The waveband of our Anti Mosquitoes Wristband conforms to international standards and does not harm the human body. Please rest assured to buy. 2. Easy to carry: The Anti-Mosquitoes Watch Bracelet is very simple and easy to wear, which will not interfere with daily life. You and your families can be protected from being bitten by mosquitoes. 3. Good Effect: Our Insect Repel Bracelet can guard against the skeeter by waveband without adding any harmful substances, which can help protect you and your children 24 hours a day. 4. Quiet Mode: Our Ultrasonic Anti-Mosquitoes Bracelet runs at a low decibel level, so it will not cause any interruptions whether it is resting or working. 5. Wide Range of Applications: Our Ultrasonic Anti-Mosquitoes Wristband is suitable for the elderly, children, and pregnant women in that it is non-toxic, safe, and convenient. Package Included: 1 * mosquito repellent bracelet 1 * Charging cable 1 * User Manual