cree Xm-l LED4 Illumination Levels & Strobe Mode Up To380 Lumens On High & 360 Hours Of Runtime On Firefly Mode 180m+ Beam Distance Intelligently Designed Interface For Easy Access To General Illumination & Strobe Modes Auto-memorization For All Settings Unique Digital Circuit Control Technology To Maximize Battery Life & Consistent Light Output Performance Reverse Polarity Protection Type III Anodized Finish Waterproof Ipx8 High Transparent Optical Lens Machined From Aircraft Grade Aluminum Stands On Tail Cap To Serve As Lamp Removable Pocket Clip Advanced Ergonomic Design With Anti-slip Knurling & Matte Style Finish For Firm Grip Strong Magnetic Tail Cap Attaches To Ferrous Objects Battery: Uses 1 Cr123a Or 1 Rcr123a Battery (3v) included Accessories: 1 Lanyard 1 Small Key Ring 2 Spare O-rings