The ball !!! Amazing power of this lamp .. The adjustment of the lens to distinguish 100m without any problem .. Up close you have to play the potentiometer because if people have to look at the beam, attention to the eyes! Great product, especially as this model is rechargeable, which is not the case of the model "H7" 1 trail with light: A super visibility, the beam can be expanded and provides sufficient power to run well in apprehending the relief .. better than 3/4 of the end in any case where many complain not to see anything .. It There also always better ... But there is a lot more expensive!