Endurance T3i Treadmill Tread belts are guaranteed for life. Ultra low maintenance phenolic deck employs a SRS (Suspended Running Surface) Extra thick and durable tread belt, multi-ply tread belts are fusion-seamed for strength Powerful Motor. Endurance motors are designed to exceed horsepower and performance standards for home-use treadmills Bright LED displays let you monitor your running track and provide you with constant feedback on your workout Endurance in home lifetime warranty that covers everything Design supported by a multi-point shock absorption system Including heart rate, elevation, time, distance, speed and calories burned Flexibility and smooth travel over the phenolic deck, endurance tread belts are guaranteed for life