Open the tail cap by twisting counter-clockwise, insert a charged quality 18650 Li-ion battery with the positive terminal towards the bezel, and tighten the tail cap by turning clockwise.

The flashlight has Reverse Polarity Protection, the light will not be damaged by batteries inserted in the wrong orientation, but it will not turn on.  If this occurs, please check the battery orientation.

Half press the tail switch to turn on the flashlight, loose to turn off. Each time the flashlight is turned on, the default setting is "LOW".

When the flashlight is on, half press the tail switch to cycle between LOW and HIGH output.  Fully press the tail switch until "click" is heard to lock the mode and fully press the tail switch again to turn off the flashlight.

When the battery voltage is too low, the flashlight will flash 2 times as a warning.  When the flash is given, please change to a new battery.

After the first flash warning, the flashlight will operate for several minutes as a safety measure.

After several minutes, the second flash warning will be given. After this warning, the flashlight will shut off automatically.

Unauthorized disassembly may damage the flashlight and void the warranty.

Weltool "Total Heat Dissipation" technology will dissipate the internal heat of the light during operation, it is normal to feel the flashlight body temperature rise.

Please check and replace the O-ring regularly to maintain the waterproof rating

Please check and lubricate the threads regularly with professional lubricant.

Clean the contact surfaces regularly to keep the flashlight normal operation.  If irregular strobe or failure to turn-on occurs, the contact surfaces may be dirty and requires cleaning by using alcohol cotton swabs.

Remove the battery from the flashlight during long term storage.

This flashlight is not intended to be used as a diving light

Do not aim the flashlight directly at eyes.  Keep out of the reach of children.