Just put your bike on the trainer and pedal away, no computers, no internet connection, no cables.
It uses a fan for resistance and the resistance is adjustable via a handlebar mounted switch. The length of the trainer is adjustable for various sized bikes.
It's in great shape.
So if Santa didn't bring you the trainer you wanted, here it is and it's cheap.
Check out the pictures.
The first $50 gets this gem of a trainer.