NiteCore EC4S 2150 Lumens XHP50 Flashlight with LumenTac Battery Organizer Upgraded from the earlier EC4, the new released (Sept.2015) EC4S offers an amazing 2150 lumens ! Easy to use dual button side switch to toggle among five brightness levels strobe and SOS Maximum 2150 Lumens provides 306 yards visibility leveraging super efficient Cree CREE XHP50 LED Support 4x CR123A or 2x 18650 batteries (not included) Package content: EC4S flashlight, holster, lanyard, Lumentac Battery Organizer Battery type supported: 2 x 18650 or 4 x CR123 Dimension: <ul class="a-unordered-list a-vertical"> Body: 5.91 in (150 mm) Head Size: 1.57 in (40 mm) Weight: <ul class="a-unordered-list a-vertical"> 6.03 oz (171 g) (Without Battery) 2150 lumens - 45 minutes 1100 lumens - 2 hours 15 minutes 400 lumens - 6 hours 15 minutes 80 lumens- 30 hours 45 minutes 2 lumens- 325 hours