It makes it easy for you to design custom circuits. Full Compatible with Arduino Mega ATmega1280 / MEGA2560. SOP28 SMD component package to be more handy Arduino electronics enthusiasts will not be directly insert bound components. The board can receive Arduino MEGA / MEGA2560 seamless plug controller. Arduino MEGA / MEGA2560 ProtoShield prototype expansion board with Immersion. 1. UNO proto shield prototype expansion board with 170 ties mini breadboard.170 ties mini breadboard based for arduino,compatible with UNO R3. 2. Components can be soldered directly on the board, or through the mini breadboard above. 3. Used in conjunction with the Duemilanove ProtoShield prototype expansion board, the circuit is used to build a prototype. 4. Full Compatible with Arduino Mega ATmega1280 / MEGA2560. 5. Wide prototyping area Seamlessly plugged into its pinout Reset button Indicator of power and status Solder components directly ICSP connector 14 pin SMD footprint (50 mils pitch) 20 pin Through Hole footprint (100 mils pitch).