The S Mini SUS Thunder Grey is the smallest CR123A battery compatible flashlight ever produced by Olight. The limited edition premium material used is Thunder Grey finished Stainless Steel.. Powered by one CR123A battery, the S Mini has four levels of brightness plus a strobe mode and covers a range from 0.5 to 550 lumens. Compared to the original S1 Baton, the S mini has a 10% shorter length and a 10% increased maximum output to 550 lumens. This is a premium flashlight reflecting refined workmanship, and assembly technology.. FEATURES --Utilizes a cree XM-L2 LED paired with a high light transmission rate TIR Optic lens. --Neutral white. --Compared to the original S1 Baton, the S mini has a 10% shorter length and a 10% increased maximum output to 550 lumens. --Gradual brightness change: When the light is turned on or off, the light will gradually fade on or off to not strain the eyes during brightness changes. --Thunder Grey Stainless Steel body. Size: 2.5" x 0.83" PRC