5.38" overall. Water resistant. Impact resistant. Tailcap switch. Modes: Turbo (2000 lumens, 2m runtime); High (1000 lumens, 18m runtime); Medium (760 lumens, 125m runtime); Low (300 lumens, 8h runtime). 300m beam distance. MLOK mount included. Compatible with Picatinny and KeyMod mounts. Remote switch with locking function for quick operation and tight fit with push of a ring. MCC3 USB magnetic charging cable. Requires (1) 21700 battery (included). Aluminum construction.