5.31" overall. SOS strobe. Weapon mountable. Tailcap switch. Pack weight: 4.94oz. CREE XPL LED. Memory retention feature. High: (900 lumens, 1h 25m runtime), Low (90 lumens, 11h 25m runtime). Includes M-LOK and Keymod adapter with remote on/off button with cord. Remote button includes hook and loop mounting straps and double stick tape. Aluminum body. Crenulated head for self defense. Requires (2) CR123A batteries (included). Clam packed.