Nyal Williams wrote:

Does this device have a display that shows the direction
of an incursion?

Yes. It warns acoustically and displays the horizontal situation with
LEDs, similiar to "traffic at 10 o'clock". It has algorithms to filter
out gliders which thermal with you. They are still working to filter out
gliders which are flying at different altitudes, and of course are
working to improve the whole algoithm.

Stefan