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