CREE LED technology - 50,000 + hours LED life; Momentary or constant-on flashlight; Sharp focused beam; Aircraft-grade 6061-T6 aluminum housing with Type III hard anodized finish; IP-X7 Waterproof; Chemical, heat and impact resistant; Meets the requirements for NFPA-1971-8.6 (2013); USB cord with rechargeable lithium-ion battery (included); Can also run on 2 CR123 batteries (not included); Serialized for personal identification