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This giveaway offer has been expired. Echo Locator is now available on the regular basis.
Echo Locator uses speaker and microphone.
Maximum distance: 2.5 m
Minimum distance: 0.5 m
Detectable distance difference: 0.06 m
-- automatic adjustment
-- works in noisy environments
Make sure that the sound volume is low.
After a few seconds a graph will appear progressing clockwise.
Adjust sound volume so that picture in the graph becomes distinguishable.
Use reflector dishes, external speakers and microphones.
Move the locator system to match current direction displayed.
Keep ears away from loud unnatural sounds like those produced by the app.
Maps & Navigation
2.3.3 and up