1200 lumens using latest Luxeon V LED; Includes lanyard with BCD Clip, 2600 mAh rechargeable 18650 Li-Battery, 18650 USB Battery Charger; Five lighting modes including flash and SOS for emergency use; Ultra-tight beam angle reaches distant underwater targets; Durable anodized aluminum body resists corrosion underwater; 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 (1) 18650 Li-Ion rechargeable battery or (2) CR123 lithium single-use batteries