The R40 diving flashlight , built in excellent quality aluminum, with tempered optical glass for greater durability and resistance. It has a powerful Li Ion battery that you can recharge very easily through a USB port.
The R40  has a burning time of up to five hours at reduced power. For greater visibility, the width of the light source is adjustable between 12º to 75º. It has an electromagnetic switch and has a light intensity of 2300 lumens and is rated to 100m.