The RFduino is essentially an Arduino with a few key differences. At the size of your fingertip, it’s much smaller than Arduino and also slightly more affordable. You can run Arduino sketches on RFduino just like a regular Arduino, although you’ll need to purchase an additional USB shield in order to load other types of code onto it.
|Clock Speed:||16 MHz|
|Processor:||32-bit ARM Nordic Cortex-M0|
|I/O Pins Digital:||7 (Software PWM)|
|I/O Pins Analog:||None|
|Dimensions:||0.9 x 1.514"|