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 400 by Nebo is not just a headlamp. It's a symbol of innovation, excellence and practicality. Designed with the needs of outdoor enthusiasts and workers in mind, the EINSTEIN 400 is a low-profile, compact 400 Lumens rechargeable headlamp with five light modes. Whether you're camping, hiking or working in low-light conditions, the EINSTEIN 400 has got you covered. With its powerful beam, you'll be able to see clearly no matter what the situation. The included rechargeable battery allows for up to 8 hr of operation in-between charges, which means you can take on longer hikes, tackle tougher jobs or explore the darkest corners of the wilderness without worrying about running out of power.