Browning Microblast Pen Light 3712123 is a handy light with a super bright Nichia 5mm LED that shines at 15 lumens, 3x brighter than most other pen lights. The Browning Pen flash light has 45 hours of battery life and lights up with AAA Alkaline batteries. The rugged all-aluminum housing on Brownings Micro Blast Pen Light 3712120 also has a heavy-duty pocket clip to keep the light at-the-ready and in the pocket so you know where it is. Covert Cover slides up for spot beam and makes the light unseen from the side. Rugged all-aluminum construction with heavy-duty pocket clip.