Rousseau

Somehow (using any of the multiple possible mechanisms), you are currently transferring the route you created to your cycle computer. The only way you can do that with Lezyne is to use your paired device. Once it is transferred over, you do not need the mobile device. What I do is transfer the route (usually a TCX file from RideWithGPS) the morning of the ride to my Lezyne computer from my mobile, after which the mobile device is in a plastic bag in my jersey. Once I am at the start of the ride, the computer recognizes the location and starts the turn-by-turn navigation.