ProtoShield prototype expansion board with two buttons and two LED circuit. It can be used directly. All of the pins and the power leads are compatible with Arduino. Arduino shield for prototyping can be very useful for pre-production or test projects. Besides, every student or hobbyist wants to have a breadboard for test purposes. Additionally there are traces on the circuit board so you can solder onto it directly. The breadboard and Prototyping Shield (ProtoShield) are separated in the package.