1. Warm and cozy feel comes together with this hat. 2. Suitable adjustable length to meet different needs. 3. Front of cap with 4 LED light, walk in dark visible. 4. Powered by 2 x button batteries 5. White light three levels of different brightness: The brightest archives uses about 2 hours, intermediate archives uses about 4 hours, low bright archives uses about 6-8 hours.