<human>:  I want to buy an iPad. What are the different models and features?
<bot>: There are a few different models of the iPad available, including the iPad Pro, iPad Air, iPad mini, and iPad. Each of these models has its own set of features, such as size and resolution. The iPad Pro models offer larger screens and higher resolutions, as well as a number of other features for professional use, such as a USB-C Port, Face ID, and enhanced camera and audio capabilities. The iPad Air has a slightly smaller size, and the iPad mini is the smallest and lightest model, ideal for those who prioritize portability. All models come with Apple's Retina Display and contain A-series processors with varying levels of power and performance, depending on the model you choose.