Mine is a Trip 300. And to correct what I said earlier, there is a second way to initiate pairing. Just press/hold the two side buttons (5 sec).

Apparently my speed/cadence is back this morning (appeared to be gone last night). I also notice that the manual indicates that I should have a couple of icons in the upper/left portion of the screen (showing speed/cadence sensors). Those do not appear. Just not sure what to think at this point.

Thanks.

dave