With nearly 3 years of design and R&D, Exceed Designs came up with the ultimate EDC flashlight. The Rampant™ R4 features titanium construction and is available in two LED options. The Rampant™ user interface with its highly intuitive rocker-button is simple. Say goodbye to strobes, forced cycling through modes to get into or out of your desired mode. "(Sapphire)" models have following lens glass & reflector configuration: Reflector optics (metal) farther throw w/dual AR-coated Sapphire crystal lens. They also include a battery and USB cable. Other models have standard TIR optics, and don't include a battery or USB cable. Fully CNC'd 6AL-4V titanium (with copper pill) Milled 6AL-4V titanium semi-deep carry clip, adjustable positioning around the barrel Custom Rampant™ UI with milled rocker button interface pressed into the housing LED options: Nichia 519A High CRI 1300+ Lumens 5000K Luminus SFT40 1000+ Lumens 5000K (farther throw) Multi-reflector compatibility built into the design IP86 waterproof inclosure Custom pressed-In copper pill for increased thermal shed Custom buck driver for long-lasting power at maximum amp without overheating