Sunny Health and Fitness have helped our customers achieve their unique fitness goals for over 18 years. The SF-RW5713 Obsidian Surge 500 water rowing machine keeps your workouts engaging & challenging - without the joint impact of other conventional cardio exercises. This in turn results in higher calorie expenditure in a shorter period of time. Compatible with ANT+ heart rate technology, like hearts rate belts or watches, so you can measure an accurate pulse when transmitted to the advanced digital monitor. Heart Rate Belt Sold Separate...- compatible with ANT+ heart rate technology, such as hearts rate belts or watches. Water resistance is designed to strengthen muscles and provide excellent cardio benefits. NON-SLIP FOOT PADS with NYLON STRAPS Strap into the large, textured, and non-slip foot pedals for a stable ride. FLOOR STABILIZERS Levelers located on the bottom adjust so the Obsidian is correctly leveled with your floors. Sunny Health & Fitness No. 003 Ab and Core Training Exercise Wheel.