The main design feature as far as this particular PDA is concerned is the
way the SiRFStar III GPS antenna is buried within the casing. With no
hinged antenna to swivel out as required, the back of this casing can be
smooth and almost flat. There's a connector for an external antenna
should you need one, and some of the back casing can be removed so you
can get at the battery to swap in a spare if you splash out on one.