Connectable: Multiple boards can be connected together for expansion, with adhesive on the back for easy connection. Mini breadboard: 170 point breadboard with tight metal springs under the connection points, the connection works great, the springs are perfectly aligned with the points, making all 170 points the same tightness. Multi-color: 6 different colors, red, blue, yellow, green, white and black. Total 12 pcs. Suitable for: Compatible with Raspberry Pi (rpi) and Arduino, led diodes, screw terminals, Dupont wires, connectors, resistors, capacitors, ICs, DIPs, sensors, transistors and other power components or devices. Widely used: For prototype circuits, electronics, electrical experiments and computer science experiments, for computer science class hobbyists experiment point-to-point projects. Size:35*47*8.8mm