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.