Bludive BD20 utilizes the OSRAM led, its max output can reach 1200 lumens, meanwhile the 6000K LED colour temperature provides superb colour rendition. SMO reflector emits a very concentrated beam at 7 degrees. There are 3 brightness settings, high-medium-strobe, users can change the brightness by pressing the stainless steel side switch. Powered by a 18650 Lithium battery, its max runtime can reach 3h40mins. BD20 is a universal dive light. Max 1200lm Output. 7 degrees concentrated beam. Stainless Steel side switch with built-in indicator. 3 brightness settings. High mode 1h 30mins, Medium mode 3h 40mins. Depth rated to 150m. Aircraft-grade high strength aluminium material. Includes: BD20 Flashlight, 18650 3400mAh Lithium Battery with USB-C Charging, USB-C Cable, Diving Lanyard, Spare O-rings, User Manual.