*Cree XM-L2(U4) LED, max 1000 lumens output                                            
*Uses 1*18650/2*CR123A/2*16340 battery
*Mechanically head rotary switch offers high reliability underwater                
*Water pressure resistant construction ,depth rated to 150 meters
*Reverse polarity protection, to protect from improper battery installation        
*Over-discharge protection function                                                                
*Aircraft-grade high strength aluminum material   
*The latest diamond grade hard-anodized seawater-corrosion-resistance finish         
*Alloy aluminum reflector with professional optical analysis
*Two sides coated toughened glass with high water pressure resistance under deep water