Breadboard Series 2 If you are interested in this product,please download the PDF for more details.- With considerable system expansion available for the computer (Binding post and various optional connectors are available for end users to fit on connector socket). - With EP-3 edge plate, it accepts big size electronic part with big size or without pin such as potentiometer, switch, light etc.... - 4 binding posts are equipped for external power supply input. - Special suggested sturdy jump wire is optionally available for connecting pin of universal connector and breadboard. - Specially suggested KS-350 jump wire kit is optional and suitable for layout of circuit.