First we should mention that there are no changes to the processor and the RAM, which remain the same, namely the Broadcom BCM2835 SoC with 256MB memory. But the entire size of the board receive a significant reduction, in particular 65 mm length against 86 of its predecessor while consuming less energy which reaches 25% again compared with the previous model.
In addition, improvements have been made in the subsystem that is responsible for the sound field. Two of the characteristics of more “expensive” model, the Model B + come in Model A +, for example the replacement of the SD card host port for a microSD cards, and a renewed GPIO header with a total of 40 pin.
The Raspberry Pi A + is now available in the United States market and England, the price remains impressive and specifically to $ 20 or £ 20 (for England).
