AIMTIS M600B Scout Light Tactical LED Mini Flashlight 20mm Picatinny Hunting Keymod Rail Mount Weapon light for Outdoor SportsModel Number: M600 Series Light Brand Name: AIMTIS Color: Black Dark Earth Length: 3. 62 inches(126mm) Bazel Diameter: 0. 98 inches(25mm) Weight: 7. 05 ounces(200g) Material: Hard Anodizing Aluminum Rail Type: 20mm Weaver rail Max Output: White light: 400 lumens 3w Tactical Runtime: 1. 5 hours Battery type: two pieces 3V CR123A (not included) Output: Constant and Momentary(with tail)