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