The high-performance ProTac 2.0 headlamp produces 2,000 lumens without sacrificing run time. USB rechargeable, designed for maximum illumination with a wide beam to light up an entire area. Uses Streamlight SL-B50 protected Li-Ion rechargeable battery. 241m beam on high mode. Powered by the new SL-B50 battery pack that charges inside or outside of the light using a USB-C cord. High/Medium/Low modes. Use low mode for extended runtime of 25 hours. IP64 dust tight, water-resistant and impact-resistant to 2m with TEN-TAP programming to choose your preferred operating mode. Machined aluminum body with sliding sleeve to protect USB-C port.