Nitecore NU21 Yellow headlamp (Nitecore, SKU: NU21 YELLOW) is an ultralight headlamp in a yellow colour version, equipped with a primary white light and an auxiliary red light. It provides an output of up to 360 lumens and a beam distance of up to 58 m, while the multifaceted optical system produces a uniform, soft beam. The built-in 500 mAh Li-ion battery is charged through a USB-C port.

Key features

• maximum white light output of 360 lumens and a beam distance of up to 58 m
• four white light brightness levels
• auxiliary red light with constant-on and slow flashing modes
• SOS and Beacon special modes
• multifaceted optical system providing a uniform, soft beam
• direct access to Low and Ultralow modes
• two buttons with different shapes and tactile surfaces for easy one-handed operation
• ability to switch between white and red light
• lockout function preventing accidental activation
• four-stage remaining power indicator
• built-in 500 mAh Li-ion battery
• intelligent charging circuit with a USB-C port
• maximum runtime of up to 37 hours
• lightweight construction weighing 44 g with the bracket and headband
• housing made from durable PC plastic
• IP66-rated dust and water resistance and impact resistance from a height of 1 m

Set contents

• Nitecore NU21 Yellow headlamp
• headband
• USB-C charging cable

Technical specifications

• manufacturer: Nitecore
• model: NU21 Yellow
• type: rechargeable headlamp
• light sources: white and red light
• white light, High mode: 360 lumens / 2 hours / 58 m
• white light, Mid mode: 170 lumens / 3 hours 30 minutes / 39 m
• white light, Low mode: 60 lumens / 8 hours / 24 m
• white light, Ultralow mode: 6 lumens / 37 hours / 6 m
• constant red light: 5 lumens / 26 hours / 4.5 m
• red Slow Flashing mode: 10 lumens
• SOS mode: 360 lumens
• Beacon mode: 360 lumens
• maximum beam intensity: 840 cd
• power source: built-in 3.7 V 500 mAh Li-ion battery
• charging port: USB-C
• charging input: 5 V / 0.5 A
• charging time: approximately 1 hour 30 minutes
• maximum standby time after a full charge: approximately 12 months
• optical system: integrated multifaceted lens
• housing material: durable PC plastic
• IP rating: IP66
• impact resistance: drop from a height of 1 m
• dimensions with the bracket: 60.1 × 33 × 25.5 mm
• weight with the bracket and headband: 44 g

The Nitecore NU21 Yellow combines low weight, practical white illumination and auxiliary red light, supporting movement and simple tasks after dark while keeping both hands free.