Note:This is the new version with the new head could be opened and without blue light issue.Specification:Productname:Astrolux S41S Stainless Steel New Version Flashlight HeadBrand:AstroluxModel:S41S Stainless SteelEmitterType:Nichia 219B/XP-G2/XP-G3Light Tint:219B(5000K),XP-G2(6500K),XP-G3 (6000-7000K)Nichia 219B CRI Rating:90Circuit Driver:A17DD-LFET+1Driver (by wight)Material:Stainless SteelTotalEmitters:4 xMode:Group1: Moon-Low-Med1-Med2-High1-High2-Turbo(short press0.5s)Group2:Low,Med,High,Turbo(short press0.5s)+Moon-Turbo-Tactical Strobe-Battcheck-Bike Flasher(Medium press 0.5s-1.5s)Working Voltage:2.8v-4.25vMaxOutput:1600lumensLens:Tir lensSuit For:Astrolux S41S ColoredFeatures: Utilizes Nichia 219B/ XP-G2/ XP-G3 LED. Uses BLF A6 Driver: A17DD-LFET+1Driver Max output of up to 1600 lumens Direct access to ultra-low and turbo output Detachable two-way anti-rolling clip Constructed from Stainless Steel HAIII military grade hard-anodizedPackage included:1 x S41S Stainless Steel New Version Flashlight Head(not included body tube and tail cap)A6 Firmwareclick herefor more details(approved by toykeeper)