2 sets of UNO Proto Shield prototype expansion card with mini mounting board SYB-170 Mini breadboard based on SYB-170 for Arduino Compatible with UNO R3 The ProtoShield prototyping board comes with two LEDs and two button circuits- ready to use pusher, with all pins and power sources present. Used in conjunction with the Duemilanove ProtoShield prototype expansion card, the circuit is used to build a prototype. The components can be soldered directly onto the board or through the mini bread plate above. The bread plate is connected to the printed circuit board by double-sided adhesive.