DUKADA Trio has two parts, a Main Cap (with the electronics) and a Top Cap. They are united when you receive DUKADA Trio. When DUKADA Trio is placed on the insulin pen, you can compare the Top Cap with the original cap. You remove the Top Cap from the insulin pen with DUKADA Trio when you take insulin (as you do with the original cap) and put it back after the injection. So, no changes of routines.
The use of DUKADA Trio is straightforward, but you can check the details in the user manual here.
Read the User Manual