RE: Wireless Thermometer
I've had a similar setup in my Westy for about 10 years now.  Also from
Oregon Scientific it has three channels.  One is used for the 'fridge and
the other sender has a local readout and the temp sensor is on a long wire.
That one is mounted on the dash to the left of the dash console and the
probe is outside under the wheel well.  This gives a temp readouts while
driving and also transmits to the display unit on the closet wall in the
living area.  So I can see inside temp, outside temp and 'fridge temp.  And
with the memory feature also provides answers to "How hot did it get?" or
"How cold did it get?"