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 capability Package included: 1 x Astrolux S41 1600LM Mini LED Flashlight 1 x Lanyard 1 x Spare O-ring 1 x Spare tail switch cover 1 x Clip A6 Firmware click here for more details(approved by toykeeper)