Illuminated Headband strip that is used on construction helmets and is designed to help the worker to be seen better in night conditions. Can be seen for up to a mile away, can also be seen through any adverse weather condition, snow, fog, smoke, rain, etc. USB rechargeable no batteries to replace ever. comes with heat activated 3m Velcro to attach to helmet. Strip does not come with helmet. Charging time is 1 hour , lasts for 8 to 10 hours of on time. Comes with car charger. Light weight, weighs less than 1 lb.