The Nebo Einstein 1500 Flex Headlamp is a low-profile, compact 1500 lumen rechargeable headlamp with 5 light modes featuring flex power.5 Light ModesTurbo (1500 lumens): 30 seconds / 64 metersHigh (750 lumens): 2 hours / 35 metersMedium (250 lumens): 6 hours / 25 metersLow (10 lumens): 18 hours / 8 metersRed COB (5 lumens): 12 hours / 1 metersDesignCompact and lightweightDurable ABS plasticSmart Power Control (SPC)Water resistant (IPX4)Flex PowerDirect-to-RedOperationTop-positioned buttons for power and mode selection.AccessoriesLi-ion 18650 rechargeable batteryOne size fits all head strapUSB charging cableBatteriesPowered by 1x Li-ion 18650 2200mAh 3.7v or 2xCR123A batteriesSpecificationsWeight: 450g (inc. strap)(L) 12.7cm x (W) 5.08cm x (H) 7.62cm