This depends on which program you choose.
You start with the PRO I study? Then take your training 84 hours. Following this day (1 x per week), then take the training 12 weeks. Following the training in the evening (1 x per week), then it takes the program 24 weeks.
Have you been following the PRO and I go for PRO II level? Then its duration depends on each course. This will always appear at the bottom of the course page. Click here for an overview of all PRO II courses.