1. Self-generating, no need external power, the energy generated during the pulling can be stored in battery and used to play music and light up the display 2. Built in Bluetooth speaker and smart phone holder 3. Free of installation, open and run design, foldable and can be stored standing upright, built in wheels for easy transport 4. Flexible foot pedal and handle design making the exercise more comfortable for feet, knees and palms 5. High strength aluminum alloy, whole machine is assembled with manually screw fixation instead of welding process, making the appearance more neat and elegant with no welding marks