Dial in your light and stay ready with booster power. The RL20RB rechargeable headlamp features Variable Light Control technology that allows you to brighten or dim the light to match the situation perfectly. Two independently controlled beams-an Ultra View Flood Beam and BULLS-EYE(TM) Spot Beam-combine to shine 1000 lumens when the dial is all the way up. Intuitive, independent controls on top of the light body add red and green LED options to your lighting possibilities. At the back of the head strap, the integrated COAST ZITHION(TM) rechargeable battery pack features a rear-facing safety signal that shines in solid red or flashing red with its own on/off switch. On this model, the headlamp's Rechargeable Plus power system comes with a booster battery pack that snaps into position on top of the integrated battery-allowing twice the run time (up to 33 hours) for long shifts or convenience in off-grid locations. For added convenience, the booster battery also has its own white LED to make it a light-duty grab-and-go flashlight. The COAST Ultra-Strap(TM)-a silicone-lined, non-slip breathable mesh band ensures a snug, comfortable fit for long periods. Monitor the battery life indicator to know when you need to plug in and recharge via USB-C. Constructed of top-grade materials, the RL20RB is IP54 water-resistant and dust-resistant and backed by a lifetime warranty.