Safety: Our electronic ultrasonic mosquito repellent bracelet creates a sound barrier, purely physical mosquito repellent, chemical free, safer, greener, safer, healthier, healthier, older, older Kids , pregnant women and pets QUICK CHARGE: Unlike other medical bracelets, our ultrasonic mosquito repellent bracelet is reusable and can be used for a long time, USB charging for 30 minutes, standby for 30 days, safe and energy efficient. 39;Energy Three modes: first gear for daily indoor use, second gear for outdoor mode and third gear for quiet mode Adjustable: the wristband anti - mosquito proof is adjustable (one size fits all) enough to fit children and adults Dimensions: 25.5 x 2.7 cm. Package contents: 2 mosquito bracelets, 2 USB charging cables Color: white/black 1. Manual measurement, please allow 1-3mm error. 2. Depending on your computer's display and brightness settings, the item's color may differ from the picture. However, the style will strictly match the style of the photo.