Great back up light, lots of light for a night dive, good looking under things 350-650 lumens.
Push button on/off with battery level indicator. All aluminum body.
Modes:3 power levels, strobe. flashing SOS
Narrow 15 degree beam with halo.
Includes lanyard and spare Orings.
Power it with either 3 x AAA, or 1 x 18650 lithium.
Batteries not included.