sofirn C8 Flashlight High Lumens 3500 Lumens, Powerful Flashlight, for Camping, Hiking Lantern (C8F-kit);

Specification
Emitter: 3 * CREE XPL LED
Working voltage: 2.8 V-4.2 V
Size: 149mm(length)* 44.6mm(head diameter)
Weight: 200 ± 2 grams (without battery)
Waterproof: IPX8, underwater 2 meters for 30 minutes
Reverse polarity protection: Yes

Operation Instruction:

The tail switch is the tactical switch, and the side switch is the functional switch.
ON/OFF
Tap the tactical switch to momentarily turn on the light; release it and the light will go out. Fully press the tactical switch to constantly turn on the light; press once again to turn off the light.

Output Selection
Group 1: 500 lumen
With the light switched on, press and hold the side switch to Standby.
Group 2: 100LM-700LM-1800LM
With the light switched on, single click the side switch to cycle through
Low→Med→High, press and hold to Standby.
Group 3: 10LM-100LM-500LM-1800LM
With the light switched on, single click the side switch to cycle through
Eco-Low→Med→High, press and hold to Standby.
Group 4: 1LM-3500LM(Ramping)
With the light switched on, press and hold the the side switch to ramp up and down, single click to Standby.

Hidden Modes
Moonlight Mode: While the light on Standby, press and hold the the side switch to Moonlight, single click back to Standby.
Turbo Mode: at Standby or other standard modes, fast double clicks to Turbo, another click goes to previous mode.
Strobe Mode: at Standby or other standard modes, fast 3 clicks to Strobe, another click goes to previous mode.

Advanced Temperature Regulation (ATR) technology:

If the head temperature reaches 50 ℃ (122 °F), the flashlight will automatically adjust brightness to avoid overheating.