This is the SparkFun Pi Wedge, a small board that connects to the 40-pin GPIO connector on the Raspberry Pi and breaks the pins out to breadboard-friendly arrangement and spacing, and even adds a couple of decoupling capacitors on the power supply lines. The “Wedge” also makes the initial bring-up process easier - you can plug an FTDI Basic module into the built-in serial port. Each version of this Pi Wedge comes preassembled and can be inserted into the RPi’s GPIO port that allows you to prototype - no soldering required!
The Pi Wedge is compatible with the Raspberry Pi A+, B+, RPi2 or RPi3 models and it adapts the GPIO header on the RPi to a standard solderless breadboard. If you love the Raspberry Pi and have been looking to start prototyping with it look no further than the SparkFun Pi Wedge!
Image and Content Credit: Sparkfun