Frentaly&reg; MB-102 830 Point Prototype PCB Breadboard + K2 Power Supply + 9V Battery Holder + 65pcs Jump Cable Wires MB-102 830 Points Breadboard with 2 Positive & Negative Power Lines on both ends. Free Bonus 1: k2 3.3 Volts Power Supply. Free Bonus 2: 65 pcs Jump wires. No Soldering. 100% Plug & Play. Free Bonus 3: 9 Volt battery Holder. Breadboard has a double sided tape on the Bottom. Can be fixed on a flat surface.