"Sports headbands and Running Light 2 in 1Workout Headbands with light provide you with good lighting at night or poor light places, and protect you from being disturbed by your messy hair and sweat. Ideal for Jogging, Biking, Camping, Hunting, Fishing, Hiking, Handyman Working, Auto Repair, and Home Improvement, or any other activity needing hands-free lighting. Comfortable and Breathable MaterialThe sport headband is made of soft material, and has elasticity, headband circumference is17.72inch, which is the general size fits to most people and it won't slip off when you exercise. Upgraded Super Bright 5 LED Light + New SOS Functionltra-bright LED light providing close up task lighting & distance lighting, Visibility of up to 72 ft. Sweatbands with three modes: strong light, low light, red light, and blue light flashing alternately. the light flashing mode used for emergency help provides more safety and confidence for people who like outdoor sports. USB Rechargeable Battery And WashableSweatband with outdoor night running lights, 48 lumens, up to 7 hours of runtime, allows you to charge in the car, computer, or power bank. Simply take out the light and throw the sweat bands into the laundry or wash it by hand."