Wowtac A2 LED Headlamp LED Headlight 5 Modes Max 550 Lumen USB Rechargeable 18650 Battery Waterproof Headlamps, Super Bright Outdoor Sports Running Walking Camping Reading Hiking Riding Fishing;

A2 Specification:

LED: CREE XP-G2 LED with a lifespan of 20+ years of run time.
Runs on: Wowtac li-ion 18650 battery (3.6V/2600mAh).
Working voltage: 0.9V-4.2V
Output & Runtime (Tested with Wowtac li-ion 3.6V/2600mAh)

SOS(550 lumens / - ),
Turbo(550 lumens/90 mins),
High(210 lumens /2.5 hrs),
Medium(66 lumens /12 hrs),
Low(12 lumens /4 days),
Firefly(0.3 lumens /45 days)

Peak beam intensity: 6030 cd (max.)
Max beam distance: 155 meters (max.)
Waterproof to IPX-7 Standard (1 meters).
Impact resistant: 1.5 meters.
Dimensions: 106mm*30mm*23.5mm
Weight: 108g (excluding battery).
Accessories: Usb Rechargeable Li-ion 18650 2600mAh battery*1, Cable*1,Spare O-ring*1

A2S Specification:

LED: CREE XP-L V6 LED with a lifespan of 20+ years of run time.
Runs on: Wowtac li-ion 18650 battery (3.6V/3400mAh).
Working voltage: 0.9V-4.2V
Output & Runtime (Tested with Wowtac li-ion 3.6V/3400mAh)

SOS(1050 lumens / - ),
Turbo(1050 lumens/2.7 hrs),
High(420 lumens /4.5 hrs),
Medium(126 lumens /14.7 hrs),
Low(24 lumens /4 days),
Firefly (0.3 lumens/59 days)

Peak beam intensity: 8230 cd (max.)
Max beam distance: 182 meters (max.)
Waterproof to IPX-7 Standard (1 meters).
Impact resistant: 1.5 meters.
Dimensions: 106mm*30mm*23.5mm
Weight: 108g (excluding battery).
Accessories: Usb Rechargeable Li-ion 18650 3400mAh battery*1, Cable*1,Spare O-ring*1

Operation

Turn ON/OFF
Single press the switch to turn the light on/off.

Change Modes
When the light is off, long press the switch to turn to Firefly mode.
When the light is on, long press the switch to cycle through Low, Middle and High.
Double click to turn to Turbo from any mode. Another double click to get SOS.