Specification:                Product name:       Astrolux S41 1600LM Mini LED Flashlight           Brand:       Astrolux           Model:       S41           Emitter Brand       CREE           Emitter Type:       Nichia 219B\/CREE XP-G2           Light Tint:       219B(5000K)、XP-G2(6500K)            Nichia 219B CRI Rating:       90           Circuit Driver:       A17DD-L FET+1 Driver (by wight)           Material:       Constructed from aero grade aluminum alloy + Copper           Total Emitters:       4 x           Mode:       Group1: Moon-Low-Med1-Med2-High1-High2-Turbo(short press<0.5s)        Group2:Low、Med、High、Turbo(short press<0.5s)    +Moon-Turbo-Tactical Strobe-Battcheck-Bike Flasher(Medium press 0.5s-1.5s)           Battery Configurations:       1 x 18350\/16340 battery (not included)           Working Voltage:       2.8v-4.25v           Switch Type:       Clicky           Switch Location:       Tail of the flashlight           Impact Resistant       1meter           Max Output:       1600lumens           Lens:       Tir lens           Carrying Strap:       included           Waterproof:       IPX-8 Waterproof 2 meters           Weight:       90g without battery           Size:       80mm x 24mm(length x body diameter)   Features:· Utilizes Nichia 219B\/CREE XP-G2 LED. Uses BLF A6 Driver: A17DD-L FET+1 Driver· Max output of up to 1600 lumens· Direct access to ultra-low and turbo output· Detachable two-way anti-rolling clip· Constructed from aero grade aluminum alloy & copper. Can also use 18650 battery if you set the 18650 tube(not included) click here to order· HAIII military grade hard-anodized· Waterproof in accordance with IPX-8 (2 meters submersible)· Impact resistant to 1.5 meters· Tail stand capabilityPackage included:1 x Astrolux S41 1600LM Mini LED Flashlight1 x Lanyard1 x Spare O-ring1 x Spare tail switch cover1 x ClipA6 Firmware click here for more details(approved by toykeeper)