Nitecore NU21 Headlamp White. 37" x 1.3" x 1". Rechargeable. SOS strobe. Water resistant. Impact resistant. Weight: 1.55oz. White and red LEDs. Modes: High (360 lumens 2h runtime); Mid (170 lumens 3.5h runtime); Low (60 lumens 8h runtime); Ultralow (6 lumens 37h runtime). Lockout mode. USB-C charging port. Reflective and glow in the dark headband. Utilizes a unibody optical lens system with various facets for reflecting a uniform and soft light. Requires (1) Lithium battery (included). PC construction. Color: White. Boxed with hanging tab. Specifications for Nitecore NU21 Headlamp White: Manufacturer: Nitecore Color: White Additional Features: High (360 lumens 2h runtime) Weight: 1.55 oz Dimensions: 2.37 x 1.3 x 1 in Package Contents: Nitecore NU21 Headlamp White