The Nitescuba G20 dive torch features a green laser pointer for underwater signaling. It offers 5 modes including combined light + laser, is waterproof to 100m, and runs up to 90 minutes on high mode.
 
Max brightness: 2000 lumens
Modes: High / Medium / Low / Green Laser / High + Laser
Green laser for pointing and diver communication
Runtime: ~90 mins (High Mode)
Waterproof: 100 meters