Item Type: Mosquito Repellent Bracelet_x000D_Gross Weight: 48g/1.7oz_x000D_Material: ABS and Silicone_x000D_Voltage: 5V_x000D_Current: 1A_x000D_Working Frequency: 34Hz to 70KHz_x000D_Battery: Polymer lithium battery 100mAh (included)_x000D_Charging time: About 30 minutes_x000D_Working Time: 7 days when fully charged, 6 months standby_x000D_Applicable Space: 5 to 10 square meter1Non Toxic: This mosquito repellent bracelet is more environmentally friendly and healthier than physical mosquito repellent. And It is suitable for pregnant women and babies. It is natural, non toxic and pollution free. 2Smart: This electronic mosquito repellent bracelet can change the mosquito repellent gear according to the environment, and change the sound wave emission frequency to achieve the best mosquito repellent effect. 3Stretch Tight: Easy to disassemble and assemble, the silicone bracelet is tightly wrapped with elasticity, and it is not easy to lose or tie your hands. 4Lightweight: This anti mosquito wristband is light and portable, you will not get tired after wearing it for a long time, and it is very fashionable. 5Waterproof: This ultrasonic anti mosquito wristband is waterproof and it will not be easily damaged whether it is exposed to rain or wet hands.1 xMosquito Repellent Bracelet ( Built in Battery)1 xManual1 x USB Power Cord