The Nebo Einstein 1000 Flex is a rechargeable headlamp with a 1000-lumen turbo mode and a beam of about 120 metres. Turbo runs in short bursts, then high gives 350 lumens for about 3 hours, medium 150 lumens for 6 hours, low 10 lumens for about 18 hours, and there is a red mode for night vision. One button controls power and all modes. With Flex-Power it runs on the included 18650 2200mAh lithium-ion battery, charged by USB-C, and can also run on two CR123A batteries at reduced output if you are away from power for longer. The compact ABS and aluminium body is IPX4 water resistant. It suits hiking, camping, running and working in the dark. In the box: headlamp, 18650 battery, USB-C cable and manual.