Product Overview.B39 is a lightweight high-performance headlamp designed for hiking, camping, adventure, rock climbing, construction work, maintenance, etc. Its main light configuration an L2 wick + both sides XPG2 wick , brightness up to 650LM in extremely bright mode, can use 1 * 21700 lithium batteries, 1 * 18650 lithium batteries and 3 * AAA batteries as a power supply drive, with five-speed lighting and burst flash function, extremely bright Switch a key to switch the extremely bright mode, charging mode using the anti-reverse plug USB TYPE-C charging port, and comes with a strong magnetic and pen clip function to better free your hands, is a good helper for you to experience outdoor activities and work.Product parameters.Material: aluminum alloyProcess: hard anodizedLight source specifications: 1 * L2 white light beads color temperature 8000K + 2 * XPG2 white light beads color temperature 8000K Luminous flux (LM)Very bright gear: 650lm Main gear: middle bright 350LM/side light bright 260LM/three-light high bright 530LM/three-light low bright 200LM/three-light flash 300LMPower specifications: 1 * 21700 lithium batteries, 1 * 18650 lithium batteries, 3 * AAA batteriesBattery capacity (MA): 1 * 21700 (4000MAH) lithium batteryRated voltage (V): 3.7 VStatic power consumption (UA): 2Charging interface: USB TYPE-CCharging indicator: red light when charging, full green lightCharging time: 5HDischarge time: middle light 8H - side light 7.5H - three lights on 5HIllumination distance: 200MAdjustment: the light body can be 160 degrees to adjust the irradiation directionProduct size: 91*54*44mmWaterproof rating: IPX4Anti-drop height: 1.5mLine protection: anti-reversal structure design, that is, the battery installed in reverse can not work but does not damage the productApplicable crowd: 15 years old and aboveApplicable scenes: hiking, camping, adventure, rock climbing, hunting, fishing, construction work, maintenance, home, etc.