This display features a 2.8" screen with 320x240 16-bit colors and a resistive touch overlay. The plate uses the high speed SPI interface on the Raspberry Pi and can use the mini display as a console, X window port, displaying images or video etc. Best of all it plugs right in on top!
It's designed to fit nicely onto the Pi Model A or B but also works perfectly fine with the Model B+ as long as you don't mind the PCB overhangs the USB ports by 5mm.
Uses the hardware SPI pins (SCK, MOSI, MISO, CE0, CE1) as well as GPIO #25 and #24. All other GPIO are unused. Since Adafruit had a tiny bit of space, there's 4 spots for optional slim tactile switches wired to four GPIOs, that you can use if you want to make a basic user interface.For example, you can use one as a power on/off button.
Note: Display current draw is mostly based on the backlight, with full-on backlight the current draw is ~100mA.