DESC: Low-center-step-through allows easy access to the seat and backrest Seat and backrest intentionally designed for good comfort and correct posture Convenient bike-brake style release lever enables the user to adjust to his or her preferred position while remaining seated Wireless Polar® transmitter (chest belt) for a highly accurate and fast responding method of heart rate monitoring Residential Warranty: 3 year parts and electronics, 1 year labor & lifetime frame; Light Commercial Warranty: 2 year parts and electronics, 1 year labor & lifetime frame