The TAG Heuer Modular 45 features an original concept which is brand new in the field of connected watches: the connected module is interchangeable with an Haute Horlogerie mechanical module – 3 hands or Chronograph Tourbillon COSC certified – and offers a vast choice of materials, colors and combinations. The concept of modularity also applies to the lugs, strap and buckle. This is nothing less than a luxury watch which can be completely tailored to suit your mood. 

SOURCE:http://en.worldtempus.com/article/watches/trends-and-style/tag-heuer-24-hours-with-the-modular-45-andres-iniesta-24389.html