The iPad mini represents a "concentration" of the larger iPad models and provides a physically smaller device but with a display that has the same number of pixels as the original iPad or iPad 2.
The iPad mini features a 7.9" 1024x768 (163 ppi) LED-backlit IPS touch-sensitive display, a dual core 1 GHz Apple A5 processor, 512 MB of RAM, 16 GB of flash memory storage, dual cameras -- a rear-mounted 5 megapixel "iSight" camera capable of shooting stills and 1080p video and a front-mounted 1.2 megapixel "FaceTime HD" camera capable of shooting stills and 720p video, dual-band 802.11n Wi-Fi, Bluetooth 4.0, stereo speakers, and more. Connectivity to computers, if desired, and power is provided by the Lightning port.
This specific iPad mini A1454 model also has support for A-GPS and GLONASS, GSM/EDGE, UMTS/HSPA+/DC-HSDPA, and LTE bands 4 and 17. In the US, it first was intended to run on the AT&T network (and T-Mobile was added subsequently).