The Nebo EINSTEIN 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 Series lights are inspired by his passion. EINSTEIN Cap by Nebo is a symbol of innovation, convenience and hands-free illumination. Designed with the needs of outdoor enthusiasts, runners and workers in mind, the EINSTEIN Cap is a 50 Lumens rechargeable cap light with three light modes and features a sensor mode that allows for contactless control of power. With its powerful beam, you'll be able to see clearly no matter what the situation. The included battery allows for up to 18 hr of operation in-between charges, which means you can take on longer runs or tackle tougher jobs without worrying about running out of power. Additionally, the sensor mode allows you to control the power without having to touch the cap light. This feature is especially helpful when your hands are dirty or when you're trying to maintain a certain level of hygiene.