Featuring

 * Green Laser 

* 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

* Constructed from high-strength A6061-T6 aluminum 

* Mil-Spec Type III hard anodized finish for durability and corrosion resistance

* Two sides coated toughened glass with high water pressure resistance under deep water