The Power Xtend System(TM) combines an external power bank that contains an included 21700 battery, along with its standard 18650 battery in the headlamp, for vastly longer runtimes. Twelve (12) lighting modes, including spotlight, floodlight, and red light, are all operated by a user-friendly rotary and button combo switch. A top feature is the red light with a maximum 130 lumens. Preserve your night vision and easily navigate the terrain all while not spooking animals. Easily charge the headlamp via its USB Type-C port and know the battery status with the battery level indicator. Impact-resistant to 2 meters and completely waterproof, this is your rugged option for hands-free lighting that will last long into the night. One Luminus SST40 cold white LED, two Luminus SST20 neutral white LEDs, and one OSRAM GR QSSPA1.23 red light LED; with a life span of 50,000 hours each Two power sources for incredibly long runtime when used together Made of high-quality magnesium alloy material, lightweight and durable Rotary mode switch and electronic level switch for easy and fast operation Spotlight, floodlight and red light Intelligent brightness downshifting function to avoid potentially dangers at close-range The USB Type-C port on the battery case supports fast-discharging The power bank features a quick-release clip so alternatively you can wear it on your pack or belt Both USB Type-C ports have inner waterproofing treatment