3" overall. Lanyard. Clip. Impact resistant. Water resistant. Strobe. CREE XM-L2 LED. T1R optic lens with high light transmission rate. Modes: Turbo (600 lumens, 1.5m runtime), High (220 lumens), Medium (50 lumens), Low (5 lumens), Ultra Low (0.5 lumen, 25 day runtime). 71m beam distance. Smart wide input voltage range circuit recognizes rechargeable lithium batteries. Compatible with alkaline, lithium ion, NiMH, and rechargeable lithium batteries. Stainless head and switch binder ring with blue coating. Recessed silicone switch. Built-in timer. Requires (1) AA battery (included). Color: Gray. Boxed.