Longer runtime for scuba diving• Great brightness, 2500 lumens output.• Cree XHP50.2 LED, high CRI, color temperature 6000K (white).• Four brightness levels - 2500/1400/700/30lm, meeting different diving needs.• Two-hour runtime, powered by 2x 26650 batteries in long type of D26 2500.• Beam throw 320m to avoid underwater dangers.• Magnetic press switch and lock function, prevention of accidental turn on/off of light.• Power indicator, reverse polarity protection.• Underwater 100m waterproof, corrosion/abrasion-resistant housing.• Smart temperature control.