Nitecore NU31 Blue headlamp (Nitecore, SKU: NU31 BLUE) is a rechargeable headlamp in a blue colour version, equipped with a primary white light, a high-CRI auxiliary white light and a red light. It provides an output of up to 550 lumens and a beam distance of up to 145 m, while the multifaceted optical system produces a uniform, soft beam. The built-in 1,800 mAh Li-ion battery is charged through a USB-C port.

Key features

• maximum primary white light output of 550 lumens and a beam distance of up to 145 m
• three light sources: primary white light, auxiliary white light and red light
• auxiliary white light with a colour rendering index of CRI ≥ 90
• three primary white light brightness levels
• two auxiliary white light brightness levels
• constant and slow flashing red light
• SOS and Beacon special modes
• integrated multifaceted optical system providing a uniform, soft beam
• two buttons with different shapes and tactile surfaces for easy one-handed operation
• ability to switch between three light sources
• lockout function preventing accidental activation
• four-stage remaining power indicator
• built-in 1,800 mAh Li-ion battery
• intelligent charging circuit with a USB-C port
• durable PC housing with an aluminium alloy front section
• IP66-rated dust and water resistance and impact resistance from a height of 1 m

Set contents

• Nitecore NU31 Blue headlamp
• USB-C charging cable
• headband
• diffuser

Technical specifications

• manufacturer: Nitecore
• model: NU31 Blue
• type: rechargeable headlamp
• light sources: primary white light, auxiliary white light and red light
• auxiliary white light colour rendering index: CRI ≥ 90
• primary white light, Turbo mode: 550 lumens / 5 hours / 145 m
• primary white light, High mode: 200 lumens / 8 hours / 90 m
• primary white light, Mid mode: 60 lumens / 38 hours / 46 m
• auxiliary white light, Low mode: 50 lumens / 42 hours / 15 m
• auxiliary white light, Ultralow mode: 6 lumens / 147 hours / 6 m
• constant red light: 5 lumens / 80 hours / 5 m
• red Slow Flashing mode: 10 lumens / 50 hours
• SOS mode: 550 lumens
• Beacon mode: 550 lumens
• maximum beam intensity: 5,800 cd
• power source: built-in 3.7 V 1,800 mAh Li-ion battery
• charging port: USB-C
• charging input: 5 V / 1 A
• charging time: approximately 3 hours
• maximum standby time after a full charge: approximately 12 months
• optical system: integrated multifaceted lens
• housing material: PC plastic and aluminium alloy
• IP rating: IP66
• impact resistance: drop from a height of 1 m
• dimensions with the bracket: 62.3 × 46 × 35.6 mm
• weight with the bracket: 76 g
• weight with the bracket and headband: 95.5 g

The Nitecore NU31 Blue combines long-range primary illumination, soft auxiliary white light and red lighting, supporting work and outdoor activities while keeping both hands free.