The Bluno Beetle Shield expands the Beetle's single analog and digital I/O pins to the 3 pin "gravity" interface, giving more power and ground connections and making it easier to attach gravity interface modules. It also includes a convenient external power supply and a 5-8v switch to power the board on and off. To use the shield, the Bluno Beetle is stacked on to the shield's I/O pins and then soldered in place.
Bluno Beetle (DFR0339) stacked on Bluno Beetle Shield
DFRobot Beetle BLE - The Smallest Board Based on Arduino Uno with Bluetooth 4.0$14.90Details