1050 Lumens Utilizes Cree Xm-l2 U2 LED 5 Brightness Modes: High and medium and low and firefly and strobe 1115ft Beam On Highest Mode Auto-memorization For Direct On and off Access To All Brightness Levels Including Strobe Machined From Aircraft-grade Aluminum Type III Anodized Finish Water-resistant With Precision O-ring Sealed Design Tempered Glass Resists Breakage Or Scratching On Impact Removable Pocket Clip Preserves LED & Electronic Components With Superior Heat Sink Designed For Quick Heat Dispersion Antislip Knurling Ergonomic Design Defends Against Physical Attack With A Crenellated Bezel On Both Head & Tail Cap Rugged Versatility For Military Police Adventurists Hunters & Search & Rescue Applications Unique Digital Circuit Control Technology To Maximize Battery Life & Consistent Light Output Performance uses 2 Cr123a Or One 18650 Rechargeable Li-ion Battery Includes High-quality Holster Designed To Fit Belts Of Various Sizes Rechargeable Battery Kit