Zebralight H501 LED Flashlight and Micro Headlamp (3 Light Levels), Jet Black Single AA Battery with Maximum Runtime of 3.5 Days CREE LED 80 degree flood with 3 Output Levels: 96, 18, 3.3 Lumens + Emergency Strobe Soft Touch Pushbutton Switch, Casing is precision 3D machined from premium Alcoa aluminum Total Weight of only 63 grams (2.22 oz) w/ battery and headband installed, 41 gram (1.45 oz) w/o headband Waterproof, Dustproof, Impact Resistant