a special PVD finish to resist salt water.
PVD (Physical Vapor Deposition) refers to a variety of different vacuum deposition methods which are used produce thin films and coatings to protect the underlying material.
keypad numbers glow in the dark, which is powered by ambient light
an upgraded motor
even more extensive free tech support
can not be opened with an iButton currently, even though there is an iButton reader below the keypad