The Pro Form 225 CSX exercise bike comes with an 8kg smooth-working, inertia-enhanced flywheel & 20 digital levels of SMR Silent Magnetic Resistance for comfortable & adjustable workout routines. There is a broad selection of workout programmes (20 preset including tempo & interval apps & manual interval training) & you can follow your progress & feedback on the Round Watts LED display, including variable preview zones such as Endurance, Tempo & Peak. in addition, there is an option to measure your heart rate by using the EKG hand pulse sensors or the Bluetooth wireless receiver (needs a Bluetooth smart chest strap). For more comfort, the seat features padding & can be adjusted for multiple users.