The ProTac 2.0 Headlamp provides an impressive 2,000 lumens of illumination using a proprietary Streamlight SL-B50 protected Li-Ion rechargeable battery. This headlamp features three user-selectable programs for versatility in lighting options. The SL-B50 battery can be charged directly via a USB-C port integrated into the battery, ensuring convenient recharging. Included with the headlamp are a USB-C charging cord, rubber and elastic head straps, and the SL-B50 battery.