The smart 3-in-1 exercise bike features durable arm resistance bands that allow the targeting of various muscles while maintaining a full range of motion. It can tighten your tone muscles while you enhance flexibility . strengthen your core and lose weight. Designed folding capabilities of the total body fitness machine . so it allows you to fold and store freely. You just fold up it for transporting and storing which gives you control of your workout and in-home space. The folding exercise bike is silent and does not take up much room. The monitor runs on aa batteries.