Featuring a 9kg (20lbs) inertia-enhanced flywheel for a smooth motion, and 25 digital levels of Silent Magnetic Resistance for varying levels of intensity, the NordicTrack GX 4.5 Pro exercise bike ensures effective, low-impact cardio workouts. The bike is fitted with a 5" LCD display that shows live workout feedback and lets you measure your pulse while exercising thanks to a Bluetooth® Smart wireless receiver with an optional chest belt. Start an interactive fitness journey and pedal all over the world using iFIT BLE technology (30-day Free iFIT Pro trial included) giving you access to global trainer-led workouts and on-demand studio classes. To maximize gains, train with the machine’s built-in sound system with dual 2” speakers and an integrated shelf for your tablet or smartphone.