The iH6 uses the patented Advanced Focus System technology. It allows a seamless transition from homogeneous, circular low beam to a sharper and highly concentrated long-distance light. For example, you can be reading a map up close or focusing down the path of up to 120 meters away. The Speed Focus system allows you to switch from reading to searching by simply sliding the bezel away from you. With one hand and one movement, you can achieve seamless transition from close to far and all points in between.