Arduino Expansion Shield for Raspberry

Arduino Expansion Shield for Raspberry Pi B+ (Compatible with RPi 2 Model B)

Onboard Microcontroller: ATmega32u4
Arduino Leonardo Chip
Arduino Compatible pin mapping
Compatible with All arduino standard shield and sensors
System Voltage: 5v
Arduino Digital I/O: 20
Arduino Analog I/O: 6
Raspberry Pi B+ GPIO: 16
Raspberry Pi B+ I2C: 1
Raspberry Pi B+ ID_I2C: 1
Raspberry Pi B+ SPI: 1
Raspberry Pi B+ TTL UART: 1
Dimension: 88mm x 56mm x 26mm(3.46″ x 2.20″ x 1.02″)