Designed with the needs of outdoor enthusiasts and workers in mind, the Einstein is a low-profile, compact headlamp with multiple light modes. Whether you're camping, hiking, or working in low-light conditions, the Einstein has got you covered. With its powerful beam, you'll be able to see clearly no matter what the situation. The model number of each light refers to its total output measured in lumens, the higher the number the brighter the light. The "Flex" models feature the option to run on separate batteries (CR123A) or their built-in rechargeable battery. 50 - Rechargeable, 3 power settings. 18 hour battery life. Clips onto a hat. 400 - Rechargeable, 5 power settings. 8 hour battery life. 500 - Requires 2x AA batteries (included), 5 power settings. 60 hour battery life. 600+ - Rechargeable, 4 power settings. 2-4 hour battery life. Removable strap, magnetic base. 750 - Requires 3x AAA batteries (included), 5 power settings. 60 hour battery life. 1000 Flex - Rechargeable, 5 power settings. 18 hour battery life. 1500 Flex - Rechargeable, 5 power settings. 18 hour battery life.
