Product features:
*Cree XM-L2(U2) LED, 630 lumens output
*Uses a single AA battery or 14500 Li-ion battery
*Mechanically head 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
*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