The Streamlight 69140 Helmet Mounted Light delivers one hundred fifteen lumens with a one hundred sixty seven meter beam for strong visibility in dark or smoke filled environments. It provides up to six hours of runtime to support extended operations. The clamp mounts to either side of traditional or modern firefighter helmets or hard hats and tightens by hand without tools. A swivel mechanism allows precise beam positioning. The rugged aluminum body and impact resistant lens withstand demanding conditions, while the IPX7 waterproof rating ensures reliable performance in wet environments. Designed for professional use, the 69140 offers dependable hands free lighting.