On Tue, 1 Feb 2005 07:42:15 -0800, "wgander" wrote:

A third nice feature is Guard. You drag the cursor on the display from the
top left corner to the bottom right corner of the area you want to be
monitored. If an object enters that area, the optional external alarm will
be sounded to alert you.]

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Yes, guard zone is the feature you want. You will not find MARPA or
ARPA on a small inexpensive radar. Watch mode in conjunction with
guard zone will reduce your average power draw to well under 1.5 amps.