THIS Guide application provides quite good information regarding how do we change the band face of the smart band and how do we pair reflex 3.0 with the fastrack reflex world application, etc.

It is a distinctive and modern watch and it has a lot of great features which are explained in this app
In addition, there are many different versions of the Fastrack Reflex watch, you can use the one that suits you according to your intended use. Likewise, you can choose the one that best suits your style among the many options of belts