This is a prototype shield the Arduino Uno.  This protoshield module sits right on top of your Arduino Uno.  It connects to the Arduino Uno I/O header and unlocks a world of possibilities for prototyping and creating.  It includes a main circuit board deck where components can be soldered directly.  Alternatively, you can affix the included 170 pin bread board to the circuit board and create a reusable prototyping surface.  The shield includes a reset button in addition to a second button which you can integrate into your project.  It also includes two LEDs that you can use at your discretion.  There are headers which provide pass-through to the Arduino I/O header, allowing for power connections, analog and digital input/output, as well as everything else you need.