This is a T-type breakout kit used for extending the GPIO interface on Raspberry Pi B+ to breadboard. It helps you to make the connections between Raspberry Pi and breadboard become simple. Compatible with Raspberry Pi A+,B+/2. Here is the breakout kit for Model B. 　 Corresponding Interface: Pin1 - 3V3 Pin2 - 5V Pin3 - SDA Pin4 - 5V Pin5 - SCL Pin6 - GND Pin7 - GPIO4 Pin8 - TXD Pin9 - GND Pin10 - RXD Pin11 - GPIO17 Pin12 - GPIO18 Pin13 - GPIO27 Pin14 - GND Pin15 - GPIO22 Pin16 - GPIO23 Pin17 - 3V3 Pin18 - GPIO24 Pin19 - SPIMOSI Pin20 - GND Pin21 - SPIMISO Pin22 - GPIO25 Pin23 - SPISCLK Pin24 - SPICS0 Pin25 - GND Pin26 - SPICS1 Pin27 - EEDATA Pin28 - EECLK Pin29 - GPIO5 Pin30 - GND Pin31 - GPIO6 Pin32 - GPIO12 Pin33 - GPIO13 Pin34 - GND Pin35 - GPIO19 Pin36 - GPIO16 Pin37 - GPIO26 Pin38 - GPIO20 Pin39 - GND Pin40 - GPIO21 Specification: wire length：19cm PCBA size：59*69*19mm PCBA color：Black Pin：40pin