Red Lasers Handheld Laser Torch Powerful Burning Laser Beam Waterproof.  It can be working under water for about 5 meters .

Dimensions: 135.2*32mm

Shell material: aviation aluminum

Surface treatment: fine sand matte black

Output wavelength: 638nm

Output power: 500mW-700mW (it can be customized )

Circuit Control: Constant Current Drive

Circuit efficiency: Conversion efficiency is over 93%

Spot form: point

Beam pattern: continuous line

Spot size: about 5M <φ15-18mm

Focus mode: adjustable focus

Diving level: 5 meters diving

Working current: 3.7V @1.7A depending on power and wavelength

Working voltage: DC=3.7V

Starting voltage: DC=2.5V

Warm-up time: no

Working temperature: -10 ° C ~ +60 ° C

Storage temperature: -10 ° C ~ +40 ° C

Product net weight: 138g

Power supply: 1X 18650