Features: 1.Universal GPIO expansion board for Raspberry Pi 2 3 B. 2.Multifunctional GPIO Extension Board 1 to 3 Port DIY. 3.It's a necessary tool for Raspberry Pi 2 3 B. Plug and play. 4.Excellent quality and Printing process. 5.These jumper caps are pretty cool. You can just press down on them to insert a wire into them, which makes your experiment easier and convenient. specification: Universal GPIO expansion board for Raspberry Pi 2 3 B. Multifunctional GPIO Extension Board 1 to 3 Port DIY. It's a necessary tool for Raspberry Pi 2 3 B. Plug and play. Excellent quality and Printing process. These jumper caps are pretty cool. You can just press down on them to insert a wire into them, which makes your experiment easier and convenient. s: Main color: Blue board Size: 5.5 * 6.4cm / 2.2 * 2.5inch Package weight: 43g Compatibility: For Raspberry Pi 2 3 B Package List: 1 x GPIO Expansion Board 1 x Screw Pack 24 x Jumper Cap