With the LIGHT² K4 the keyring series LED torches start to get serious! It may output the same 16 lumens as the LIGHT² K3 and also take the same AAA battery and keep going shining for the same astonishing 96 hours but because of its superior spot to flood sliding focus it can project the light twice as far! Not only that but because the focus is adjustable you can decide whether you want to see far into the distance or illuminate more immediate surroundings. It comes complete with a swivel keyring so that you can keep it with you at all times. Rugged enough to cope with whatever you throw at it, this flashlight has a IP65 water and dust proof housing that is also shock proof from a height of 1 metre. If you like the LIGHT² K4 you may also be interested in the LIGHT² K1, K2, K3 and K5.