Under the hood you will find an automatic, Japanese SII NH35 movement. The glass is 4.5mm thick scratch resistant sapphire glass. The impressive 1000 meter water resistance of this watch is possible due to the helium valve, that you can see on the side of the case. The uni-directional 120 clicks bezel has a ceramic insert (which is very scratch resistant) and the characters have lume. All these qualities ensure to the Sharkmaster is able to handle nearly any situation.