Dropdown list for values in custom profile field

[MaXimus]

Hi,

I have created a few custom profiles on my forums such as Device (where users have to enter their BlackBerry Smartphone Model Number), but I saw on another forums, that they have the same profile field, but it has a drop down list where users can select their device rather than typing it down.



I tried reading in the vBulletin Manual and I assumed that the closes thing to this would be to make that profile field a Multiple Selection Box rather than a Single Text Field but I can't find that in my options, I only can choose either single text field or multiple text field


I am running on vBulletin v4.1.8

Can someone help me out please?