1. Durable and stretchable headband with a silicone lamp shell. It is adjustable to any head size. 2. Super bright with 5 light modes that illuminates up to 230 degrees and 150 feet away with the 350 lumen LED lights. 3. Easy to Operate with one button to switch in 5 power modes. 4. Applicable to various scenarios such as running, jogging, camping, hiking, fishing, bicycling, do walking, reading, outdoor recreation, construction, emergency, etc. Note: No direct shining on the eyes of people, nor animals, which may cause instant blindness.