The Nebo Einstein 500 is a compact, lightweight headlamp that runs on three AAA batteries, which are included, so there is nothing to charge before a trip. It gives a 500-lumen turbo burst with a beam of about 80 metres, then high at 150 lumens for about 2 hours, medium at 50 lumens for about 15 hours and low at 5 lumens for up to 60 hours, plus a 5-lumen red light for keeping your night vision. A single button controls power and modes. The ABS and aluminium body is IPX4 water resistant, so light rain is no problem when hiking, camping, fishing or working outside at night. In the box: the Einstein 500 headlamp, three Nebo AAA batteries and a manual.