5.63" overall. Water resistant. Impact resistant. Weapon mountable. Rechargeable. Jack-Cap operational switch redundancy. Integrated rail clamp attaches to MIL-STD-1913 rails. Multi-fuel: Uses (1) SL-B26 protected Li-Ion rechargeable battery pack (included) or (2) CR123A lithium batteries (not included). TEN-TAP programmable. Easy to attach, secure mounting. Modes: High (800 lumens, 2h runtime); Low (55 lumens, 26h runtime). 648m beam distance. Aluminum construction. Color: Black. Boxed with hanging tab.