You can switch up the look of your Fitbit Ace, Fitbit Alta, and Fitbit Alta HR with different accessory bands. You can use all 3 bands interchangeably, but keep in mind that Ace wristbands are shorter than Alta and Alta HR bands in size small.
Alta HR bands have a color-matching aluminum buckle that holds your band securely in place. Alta HR bands are designed specifically, and tested rigorously, for heart rate tracking.
Alta bands come in a variety of colors and materials, including a metal band to elevate your style and several bands from our Designer Collection
Heart rate tracking may not work with certain accessory bands, especially if they're loose fitting. For optimal results, we recommend wearing a Fitbit-branded classic or sport band during exercise. For more information about tracking your heart rate with your Fitbit device, see What should I know about my heart rate data?