Smooth Fitness 6.45 Folding Treadmill 20" x 60" Whisper Weave Tread belt - Whisper Weave technology helps make Smooth treadmills as quiet as any on the market today Patented Swing Arm Shock Absorption - The patented suspension running deck is proven to lessen the impact of walking and running Dual-Stage, Soft Drop Folding - Gas shock-assist lift you can gently tilt the deck into position and wheel it away for storage. Then softly drop it back into place and it's ready for use Fitness Test - Monitoring your progress couldn't be easier! The Smooth 6.45's built-in Fitness Test function provides an excellent way to evaluate your own cardiovascular fitness level Warranty: Lifetime warranty on the frame and motor; 5-year warranty on all parts and one year of in-home service