The rechargeable waterproof chrono watch, compass and Wrist-Light combo is a lightweight tool that provides hands-free 180 lumen illumination for a broad range of lowlight scenarios. The watch is constructed from a high-impact polymer and is powered by a single rechargeable lithium-ion battery thats easily charged using an included micro-USB cable. This is a must have for anyone who uses both their hands for any sort of activities in the dark.