Precor TRM 946i Commercial Series Treadmill Commercial-grade treadmill with Ground Effects Impact Control System to help reduce fatigue and joint stress and prevent injury Built-in touch sensor for heart rate monitoring and Polar compatible 5 KHz wireless chest strap transmitter monitoring 13 preset workouts accessed directly by 6 buttons; Speed range 1-12 mph/1-20 kph Measures 79"L x 34"W x 59"H; Running surface: 22" x 56"; Weighs 331 pounds Lifetime warranty on frame and welds, 10-years on parts and wear items