The Fenix HM70R Rechargeable Headlamp features a high-capacity 21700 battery, that not only boosts this headlamp to a maximum 1600 lumens, but also allows for a 100 continuous hour runtime when using 30 lumens on Low. Press and hold the large, glove-friendly switch to change over to the Functional mode to access two levels of neutral white light, a red reading light, and a red flash. The hidden USBC port adds to its IP68 dustproof/waterproof rating and allows you to quickly charge your headlamp with a 2A charging current. Battery level indicator, intelligent memory, and lock out function, round out the features of the Fenix HM70R Rechargeable Headlamp. Product Features A Luminus SST40 white light LED, an XP-G2 HE neutral white LED and two 2835 red light LEDs. Included a 21700 Li-ion battery, a 18650 Li-ion battery can be used as well (together with an ALF-18 battery holder). White, neutral white and red lights combined. Toughened ultra-clear glass lens with an anti-reflective coating. Hidden USB Type-C charging port supports 2A charging current. Large thumb-sized switch for easy and fast operation. Digitally regulated circuit for maintaining a stable output. Product Specifications Max Lumens: 1600 Max Beam Distance: 610 feet (186 meters) Max Runtime: 100 hours Lighting Modes: 4 brightness levels on spotlight, 2 neutral brightness levels on floodlight, red, and SOS Bulb Type: Luminus SST40 white light LED, an XP-G2 HE neutral white LED and two 2835 red light LEDs Lens Material: Polycarbonate Color Temperature: Spotlight 6000K Size: Length: 3.72 (94.5mm) Width: 2.01 (51mm) Height: 1.81 (46mm) Weight: 7.27 oz. (206g) including battery and headband Battery: One included 21700 rechargeable li-ion battery Included: ARB-L21-5000 li-ion battery, USB Type-C charging cable, spare O-ring