The NU25-400 is available with 3 light sources to produce a max output of 400 lumens while the spotlight and floodlight are both primary lights, achieving a perfect combination of long-distance throw and flood beam. Utilizing a unibody optical lens system with a light transmission of over 94% and high-performance LEDs, it reflects a uniform and soft light ideal for night running and route finding.

The NU25 weighs 56g (1.98 oz) and is made from lightweight PC material and is equipped with hollow brackets. In terms of the headband, the NU25 uses a dual-purpose sports headband, featuring reflective and glow-in-the-dark performance while it is able to be detached to morph into a running headband, preventing irritation on the eyes that is caused by sweat regression.

Built-in 650mAh Li-ion battery, the NU25 is available with USB-C input and cycle charging, which can reduce the discard of 900+ AAA batteries over a battery life cycle. Apart from the Lockout Mode to prevent accidental activation, it has one hand operable to control the beam and show the remaining battery power. The NU25 is all-weather applicable as IP66 rated.