The NEBO EINSTEIN(R) Series is inspired by, obviously, Albert Einstein, who had a brilliant mind and a knack for innovation. He was fascinated by light and its many uses, and the EINSTEIN(R) Series lights are inspired by his passion. Features: A symbol of innovation, convenience, and hands-free illumination. Designed with the needs of outdoor enthusiasts, runners, and workers in mind 50 lumen rechargeable cap light with 3 light modes and features a sensor mode that allows for contactless control of power The included battery allows for up to 18 hours of operation in between charges Sensor mode allows you to control the power without having to touch the cap light Water resistant (IPX5) 1 meter impact resistant 1 Micro-USB to USB charging cable 1 Hat clip