This mosquito repeller bracelet has flexible and comfortable silicone strap, adopts safe physical way, and performs well in driving mosquito. Both children and adults can wear it. Besides, the strap is removable. You can disassemble it, replace it with the accessory of string, and get a mini mosquito repeller finally. A perfect mosquito repeller band to use! Say goodbye to annoying and buzzing flies. Features: Premium Material: made of high quality plastic and silicone, it ensures non-toxicity, safety and durability for use. Lightweight & Comfortable: this lightweight bracelet, comes in only 0.63oz, and provides comfortable wearing. Efficient & Safe: it takes use of ultrasonic waves effectively preventing mosquitoes from biting, without producing harmful chemicals, odors, etc. Multiple Modes: it has multi-modes(outdoor/indoor mode); you can select the suitable mode as you need. Long Service Time: built-in rechargeable 100mAh battery provides a long term usage(7 days of working time, 6 months of standby time). Adjustable Wrisband: the wristband is capable of being adjusted; you enable to adjust it according to your wrist. Waterproof & Dustproof: its water-resistant level reaches IP65, making it withstand splash and rainwater, meeting your daily demand. Wide Applications: it is perfect to wear it keeping away from flies, when you are camping, fishing, hiking, shopping, etc. Specifications: Material: Plastic + Silicone Battery: 3.7V Polymer Battery Battery Capacity: 100mAh Water-resistance Level: IP65 Working Range: 5-10 meters Frequency: 34Hz-70KHz Input: 5V/1A Charging Time: Approx. 30 minutes Working Time: 7 days Standby Time: 6 months Diameter: 31mm / 1.22in