The device supports Auto Pause setting, there are two ways to set.
1. With OnelapFit app
OnelapFit app>Me>My Bike Computer>Functions>Auto Pause
2. C406 Pro device
Main screen>Settings>Auto Pause
Auto Pause enabled: the device will pause automatically when the detected speed goes below the designated speed you set
Auto Pause disabled: You can manually pause the bike computer from recording data after starting the ride