The Mag Smart Equipped can help you tally the miles. The easy-to-store, foldable trainer frame features an adjustable linear resistance unit with five levels and comes with a speed sensor that can be used for any virtual or non-virtual training ride. For use with your favorite indoor cycling app, install the speed sensor on the rear wheel of your bike, mount your bike to the Mag bike trainer, connect via Bluetooth or ANT+ and prepare to sweat.