Specifications: 

• ARM Cortex-M4 32-bit processor, 64 MHZ. 512 kB flash/64 kB RAM. USB full speed port (12 Mbit/s).
• Onboard membrane buttons for manual programming.
• 4 input - output ports.
• Connect up to 2 sensors digital or analogue and up to 2 motors (servo or analogue).
• Power source: 3 x AAA batteries (not included).