The 4DPI-24-HAT is a 2.4-inch 320 x 240 Primary Display HAT for the Raspberry Pi, which plugs directly on top of a Raspberry Pi and displays the primary output which is normally sent to the HDMI or Composite output. It features an integrated Resistive Touch panel, enabling the 4DPi-24-HAT to function with the Raspberry Pi without the need for a mouse. Communication between the 4DPi-24-HAT and the Raspberry Pi is interfaced with a high speed 48MHz SPI connection, which utilises an on-board processor for direct command interpretation and SPI communication compression and features a customised DMA enabled kernel. It is designed to work with the Raspbian operating system running on the Raspberry Pi, as that is the official Raspberry Pi operating system. The 4DPi-24-HAT is powered directly off the Raspberry Pi's 40 way Header and the 2.4" touch screen allows effortless interaction with the Raspbian operating system.