Product Material: ABS+cotton+spandex Size: free size (with elasticity adjustable) Lamp beads: 4 Battery capacity: 200mah Power source: battery Power: 1W Light source form: LED Light color: white light, three levels of different brightness Color: black, gray, fluorescent green Quantity: 1 piece Package content: 1 piece * with lamp headband 1. Multifunchion Practical Use The LED sports headband is lightweight and vertical for camping, hiking, mountaineering, gym, basketball, soccer, tennis, training, running, hiking, yoga, cycling, badminton, baseball, table tennis and other physical exercise activity to maintain health and fitness for every user. 2. Visibility & Safety There are two modes for our LED lighted hat. White light illumination mode ensures that you can see clearly. There are three stalls that you can choose from 3. Detachable design We have a detachable design. You can easily remove the energy. Convenient for washing knitted headband and charging. Very user-friendly design. 4. Size And Material Ingredients Cotton, Spandex, Nylon. They fit both men and women. One size fits all. 5. Wide range of uses Very practical knitted sports headband. The thick material has a certain warming effect. Unique lighting design, very suitable for night running, night fishing, outdoor camping, hiking, repairing and so on.