The Nitecore NU21 is an ultra lightweight dual beam rechargeable outdoor headlamp with a maximum output of 360 lumens and weighing just 44 grams.

The advanced headlamp features a one-hand operational dual button interface, a user-friendly and tailor-made reflective, glow-in-the-dark headband, high performance LEDs and a red light, making it the perfect headtorch for trail running and other outdoor activities.

The NU21 is rechargeable using the USB-C charging port on the side of the torch. A power indicator is available with a short press of the mode button to show how much charge is left. A lockout mode is also available for accidental activation prevention, making it safe to carry or store the headlamp in a backpack or pocket.

 The Nitecore NU21 also features:

• Built-in 500mAh battery
• Highly efficient constant current circuit
• 4 Brightness levels
• 3 special modes
• IP66 waterproof/dustproof rating
• impact resistant to 1 meter

Brightness levels,  beam distance and runtime

Dual Light

High: 360 lumens - 58 meters  2 hours

Mid: 170 lumens - 38 meters - 3.5 hours

Low: 60 lumens 24 meters - 8 hours

Ultralow: 6 lumens - 6 meters-37 hours

SOS: 360 lumens

Beacon: 360 lumens

Red Light

Constant on: 5 lumens - 4.5 meters - 26 hours

Slow flashing: 10 lumens

Includes: headband, USB-C charging cable

Advanced Temperature Regulation (ATR) adjusts the output of the NU21 based on the working and ambient temperatures. This feature ensures that the device maintains optimal performance while preventing the LED from overheating. The output measurements account for the total runtime, including periods of reduced brightness due to temperature changes or built-in protection mechanisms, which may cause the brightness level to drop.

Available in Black, Yellow or White.