The included chest strap heart rate transmitter and handlebar mounted hand pulse grips give you two ways to monitor your heart rate making your workouts both efficient and effective. XTRASoft deck cushioning technology, oversized 20” x 60” running surface, and 0-15% incline range are included in the long list of premium features.
https://www.amazon.com/XTERRA-Fitness-TRX4500-Folding-Treadmill/dp/B078HJM9HZ