Comfortable on the knees: Smooth circular motion that doesn't put pressure on joints or back like running. Engages the whole body: Works your arms, chest, glutes, and legs at the same time. Difficulty control: You can increase or decrease resistance as you like to burn more fat. Screen that counts everything for you: Measures time, distance, speed, and calories burned. Quiet and space-saving: Its size is suitable for home and its sound is light, it doesn't disturb those with you.