There are several names for this exercise machine. Some called it Elliptical Exercise Machine or Elliptical Bike. Whereas others call it Cross-Trainer.
It is called cross trainer exercise equipment because it combines the movements of the stair climber, treadmill, and the exercise bike into one. It combines the movements and benefits of hiking, cross country skiing, and biking.
Two major benefits of using this machine:
1) As compared to treadmill, it will have no effect on your knees, ankles, shins, and back because your limbs remain in continuous contact with the machine. Thus this machine is ideal for those who are overweight, have arthritis and have chronic knees problem.
2) Using this machine will help you burn more calories depending on the level of intensities you choose.
Actually, I am thinking of buying one for my home.