Experience the same luminous glow found in the Glow Fobs with the lightweight and cost-effective Ember fob. Designed for versatility, it easily attaches to your keychain or any zipper on your gear whether it's a backpack, range bag, tent, or sleeping bag so your essentials are always easy to find. Powered by tritium, the Ember is completely self-sufficient and requires no external charging. With a half-life of 12.23 years, it provides long-lasting illumination you can rely on. Durable and practical, it's a smart addition for both personal use and gifting. Product Details Length (excluding keyring): 1.13" Diameter (excluding keyring): 0.31" Compact and lightweight design Long-lasting tritium illumination Product Features 1 cylindrical tritium lamp included Injection molded polycarbonate casing Integrated glass breaker tip Keychain hole / lanyard loop Includes keyring Waterproof construction