* 3*Cree XM-L2(U2) LED,2000 lumens output                                            

* Uses 2*26650 batteries

* Aircraft-grade high strength aluminum material                                     

* Over-discharge protection function
* Mechanically tail rotary switch offers high reliability underwater
* Water pressure resistant construction ,depth rated to 150 meters

* High efficiency constant current circuit, constant brightness

* Reverse polarity protection, to protect from improper battery installation

* Alloy aluminum reflector with professional optical analysis

* Premium Type III military hard-anodized seawater-corrosion-resistance finish

* Toughened glass with high water pressure resistance under deep water