Lightweight, compact and low profile, the VANTAGE II is designed to easily attach above or below full brim fire helmets. The light features the latest in power LED technology combined with an ultrabright blue LED safety tail light. High: 350 lumens, low: 135 lumens. Safe off feature prevents accidental activation, saves batteries; Uses one CR123A lithium battery (included). Meets requirements of NFPA 1971-56 (2013) and is IPX 7 waterproof to 1M for 30 minutes and 1M impact resistance tested.