What are these " Built-in patch antenna .... " ?

Question

Built-in patch antenna

Dual internal speakers

What are these ? What are they do or use for ?

Thanks !

Answer 1

Patch antennas are used on modern GPS units.  All it means is that the GPS antenna is built into the GPS.

The speakers are used so that you can hear the navigator's voice.

Answer 2

A patch antenna, from wiki:  

    The simplest patch antenna uses a half-wavelength-long patch and a larger ground plane. (Large ground planes give better performance but of course make the antenna bigger. It isn’t uncommon for the ground plane to be only modestly larger than the active patch.) The current flow is along the direction of the feed wire, so the vector potential and thus the electric field follow the current, as shown by the arrow in the figure labeled E. A simple patch antenna of this type radiates a linearly polarized wave. The radiation can be regarded as being produced by the ‘’radiating slots’’ at top and bottom, or equivalently as a result of the current flowing on the patch and the ground plane.

Dual internal speakers would simply be two speakers, most likely stereo, built into the device.  A boom box would have internal speakers, dual for stereo.  Some televisions have dual (stereo) built in speakers.