1600 lumens using latest Luminus SFT-40 LED; Five lighting modes including flash and SOS for emergency use; Ultra-tight beam angle reaches distant underwater targets; Anodized aluminum head and anodized aluminum alloy body; Color battery indicator displays real-time charge levels; Waterproof down to 330 feet with dual O-ring seal protection; Integrated safety pressure release valve for added battery safety; Compact size easily fits into BCD pocket or attaches to gear; Compatible with 18650 rechargeable Li-ion batteries; Includes a wrist lanyard with BCD clip, (2) spare O-rings, and O-ring lube