The Nitecore NU21 headlamp has a maximum output of 360 lumens from the high performance LED and is powered by a built-in 500mAh li-ion battery. The light is rechargeable via a USB-C port on the side and comes with a charging cable.

Offering simplicity and an extremely lightweight design, the NU21 is an ideal light for outdoor activities such as trail running, camping and night photography. In addition to the impressive white light, the NU21 also has a red light for map reading, emergency response, stargazing and wildlife watching.

The NU21 is operated by a dual switch interface on the top of the light, allowing for one-handed use. A lockout mode is available to prevent accidental activation and a short press of the mode button will activate the power indicator:

• 1 LED = 25% battery remaining (approx.)
• 2 LEDs = 50% battery remaining (approx.)
• 3 LEDs = 75% battery remaining (approx.)
• 4 LEDs = 100% battery remaining (approx.)

The 44g lamp has a hollow bracket and a reflective, adjustable headband that glows in the dark without compromising on comfort. The NU21 is made from high quality PC materials which are lighter, more durable and more resistant to low temperatures.

Available in black, white and yellow.

Brightness Levels:
White light
High: 360 lumens - 2 hrs runtime
Mid: 170 lumens - 3.5 hrs runtime
Low: 60 lumens - 8 hrs runtime
Ultralow: 6 lumens - 37 hrs runtime
Plus SOS and beacon (360 lumens)

Red light
On: 5 lumens - 26 hrs runtime
Flashing: 10 lumens

Advanced temperature regulation (ATR) regulates the output of the NU21 according to the working and ambient temperature to maintain optimal performance while preventing the LED from overheating. The outputs are measured in total of runtime, including output at reduced levels due to temperature or protection mechanisms in the design, causing the brightness level to drop down.

Maximum beam distance 58 meters, waterproof to IP66 and resistant to impacts up to 1 meter.

Includes: headband, USB-C charging cable.

Nitecore NU21 user manual can be downloaded here.