Style: Knitted headband, sweatband Material: Acrylic Lamp power: 1W Battery capacity: 200mAh Charging time: Approximately 120 minutes for full charge Suitable for: Outdoor hiking, night fishing, cycling, etc. Hat size: Adult style (elastic) Charging method: Standard USB 2.0 interface charging Lighting mode: Three levels of white light with different brightness levels Battery model: 502030 Lithium-ion battery Charging voltage/current: 5V/200mA [Comfortable and High-Quality Materials] The LED sports headband is made of breathable knitted fabrics and has a friendly and comfortable fit. Only 62 grams and balanced weight distribution provide a snug fit. Suitable for men, women, and children in activities. [Long-lasting and USB Rechargeable Headband] 6 hours of battery life in Medium mode and 4 hours in high mode. High-quality lithium rechargeable battery - conveniently charge anywhere! No hassle of changing batteries and no extra costs. [Expandable Headband] Uses elastic and stretchy fabrics, no toxic materials for a comfortable, snug fit. Trendy and unisex design headbands are one size fits all. [High Visibility] LED lights on the headband make you visible to cars, motorcycles in all weather conditions such as darkness, rain, fog, to protect you when running, jogging, walking the dog. [Fully Washable] The headband features acrylic which makes the LED module easy to remove and reinstall so you can wash the headband. Hand wash recommended after removing the LED module.