Coast TX3 Tactical Strobing 75 Lumen LED Penlight Twist focus; 75 lumen light output; high, strobe and low output modes 3 hour 15 minute runtime; 85 meter (278 ft) beam distance Aluminum casing; rubber rear switch; impact and water resistant 2 X AAA batteries (included) Length: 5.75 in./14.61 cm; Weight: 2.2 oz./62.37 g; Diameter: 0.715 in./1.82 cm