FEATURES 10ATM 100 meters (330 feet) waterproof (using the Twist Cap): 1 Interchangeable color waterproof washers/seals (red yellow blue): 2 3 Watt high powered LED reflector unit: 3 Aircraft grade aluminum body: 4 2 x CR123A lithium batteries: 5 Twist tail-cap switch for submersion: 6 Push button tail-cap for tactical use: 7 Removable wrist lanyard: 8 Universal tail-cap thread protector: 9 Anti-roll hex offering a tactical finger grip: 10 Negative buoyancy: 11 Focused beam light spread: 12ATTRIBUTES Batteries Included: Yes Bulb: LED Burn Time: Up to 10 Hours Carry System: Removable Wrist Lanyard Finish: Black Material: Aircraft Grade Aluminum Output (lumens): 72 Overall Length (inches): 5.30 Power Source: CR123A Lithium x 2 Special Features: Anti-Roll Hex Tactical Finger Grip Interchangeable Color Waterproof Washers Submersible: 10ATM Switch: Momentary Push On Permanent Twist On