Question about Kibernetik Ks130l02

According to the data sheet, the refrigerator's rough internal dimensions are 71.5 x 45 x 43 centimetres. As far as I can see from the product photo, there is a step at the bottom of the interior where the refrigeration unit is located. How high is this step and how deep is it? Or in other words, what is the total height of the interior (71.5cm) minus the step height? 2. can the three shelves on the door be removed? 3. how far down can the refrigerator cool?