- Uses one 18650 battery<br /> - Magnetic controlled tail switch offers high waterproofness and easy operation underwater<br /> - Standardly included wrist strap fastens the flashlight to the back of your hand<br /> - Water pressure resistant construction, depth rated to 150 meters<br /> - High efficiency constant current circuit, constant brightness<br /> - Reverse polarity protection, to protect from improper battery installation<br /> - Over-discharge protection function<br /> - Alloy aluminum reflector with professional optical analysis,etc.<br />">