Popup Select Box is an enhancement over of the ordinary SelectBox. Instead of selecting from a generic drop-down list, the Popup Select Box allows you to select from a Datalist instead.
Figure 1: Popup Select Box in New Contact form Form in the CRM App
Figure 2: Making a selection using Selection Using the Popup Select Box
By incorporating a Datalist datalist in making a selection, one would be gain access to you'll be able to access the functionality of Datalist and be able to see other related details as well.
Figure 3: Selection made using Made Using Popup Select Box
Figure 4: Properties of Popup Select Box