It should. The 705 is a very old unit and over the years Garmin has increased the length of the sensor ID. An older unit may not be able to correctly handle the longer ID's used by newer sensors. It should pair, but may not show the correct ID.
I never got it to work but also didn't try as hard as I perhaps should have. The 1030 had some appealing features, primarily radar and larger screen, so I upgraded. I'm OK with a new computer every 10 years. :-)
Of course now they're going to come out w/ a larger screen and add in the rear facing camera that I'd been waiting for.
