Make sure you have these three things ready:
1.Your Powered-Up handset
2.Your Powered-Up Smarthub
3.A train motor for your LEGO City train.
Now you can install a train motor on your train and connect the wire to the Smarthub! Once the Smarthub and handset have been connected, they will both remember each other the next time you switch them on together.
Bonus tip: Find out how to connect lights to your train. (Lights sold separately.)