 they will take the best readings off of whichever device is working at the best that time. So if you're sleeping, it'd probably be the ring. If you're out on a bike ride, it'd probably be the watch. So let me tell you about this UltraWatch. This is $650. It's fantastic. It's got a titanium frame. It's got good water resistance. It's got good altitude, so you can go from 500 meters below sea level to 9,000 meters high.