Mere 96 grams is the lightest headlamp with 4 Ultrabright LEDs for the constant brightness on all modes in an ultrtalight waterproof housing,strap buckle doubles as tool to open battery pack,built in battery tray, large single switch, rotates 90°, Uses 3-AAA batteries, (not included),approx :150 hours burn time.Olvie Drab camo.