The Fusion 260 is a small light with all the big light features. The big light features include adjustable beam angle 12 100 , pressure safety valve, 4 way slide switch and removable head all in a small package with a 260 lumen output. This light is a great backup or as your companion during the day to poke into holes or under a ledge. The Fusion 260 is a must for any diver. Includes lanyard, 14500 Li-ion battery, charger & USB cable.