Just bough Power Meter and try to use this in Two Nav Ultra.
It shows actual Power ( via ANT ) but i dont know why it doesn't show cadence from the same sensor ( 4iii http://4iiii.com/product/precision/).
In IPbike on my smartphone (via Bluetooth smart=BLE) i have Power +cadence from the same sensor.
In Sigma Rox 10 - the same power +cadence.
( I tried before -Cadence works but with other sensor for ex. Wahoo BLU SC,Garmin GSC10 ....)