If you want to do some diving activities,like deep-sea exploration,
hunting or observing underwater nightlife, the   F8  diving flashlight
is built for all diving activities. a maximum output of 800 lumens of
white light ,
it built-in 3x 18650 rechargeable batteries,Have Power Bank Function

and have USB Type-C Charging port

All the flashlight have the Professional waterproof test,see the video

Product specification

Model : F8
Source: 10W  LED
Power supply: 3 18650 lithium parallel supply
Material: High quality aviation grade aluminum alloy 6061-T6, high-density hard plastic
Modes : 3 lighting modes  - Turbo 800 lumen/ High 500 lumen / Mid 60 lumen
Size: 24.2CM
Product Name: F8 rechargeable flashlight diving
Source: United States imported XML-T6 LED
Product Main material: high-quality aviation grade aluminum alloy 6061-T6, high-density hard plastic
Product Weight: 552 grams with battery
Reflector Type: vacuum coating aluminum reflector cup
Battery: 3 18650 lithium parallel supply
Third gear function control: 100% glare -20% -40% medium light low light
Operating voltage: 3.7 V
Maximum luminous flux: 800 lumens
Maximum output power: 10W
Continuous light: about 10 hours
Terrestrial range of up to 1,000 meters, to within a range of 60 meters underwater
Water level: IPX-8

Supplied in Retail Packaging and Includes:

1x  Professional Rechargeable Diving Flashlight
1x AC charger  
1x Lanyard