The AL1X5MAFO LED Dive Light from Bigblue is the miniature version of the AL1X5AFO. It has a double O-ring seal and a depth rating of 328'. The light outputs 250 lumens at a beam angle of 55° and a color temperature of 6500K. It will burn for up to 4 hr at full power. It also has an Auto-Flash-Off feature: When the photo-cell sensor within the LED recognizes a strobe flash, the light turns off automatically for 1 sec, so only the strobe will illuminate your subject. The body of the light is constructed from durable aluminum, which has been anodized to safeguard against the corrosive effects of seawater. The light has positive buoyancy. It is powered by three AAA batteries (not included). The plastic mounting clip has a stainless steel screw and enables connection to a standard Y/S joint. The included lanyard with a rubber wrist strap helps ensure you don't lose the light.