The Streamlight TLR‑1 is a durable, weapon‑mounted light built for duty, tactical, or home defense use. Its compact design delivers a powerful 300‑lumen beam with a reach of approximately 140 m (12,000 candela), all driven by two CR123A lithium batteries providing up to 2.5 hours of runtime. Machined from aircraft‑grade aluminum & finished with anodizing, it resists shocks and the elements (IPX7 waterproof). The rail‑grip clamp system secures & removes the light quickly without tools or risk of placing a hand in front of the muzzle, and Streamlight includes multiple rail keys for compatibility across Glock, Picatinny, S&W, Beretta and Sig rails Despite its robust construction, the TLR‑1 remains a practical size at 3.39 in long and 4.18 oz with batteries, making it suitable for most full‑size pistols and compatible holsters . It features a programmable strobe, ambidextrous paddle switches for momentary or constant activation, and a secure, user‑friendly clamp that ensures stability under recoil. Whether clearing rooms or navigating low-light conditions, the TLR‑1 balances high performance with proven reliability.