WWZMDiB 2Pcs Nano I/O Expansion Sensor Shield for Arduino Nano 3.0 UNO R1 Duemilanove 2009 ?Nano I/O Expansion Sensor Shield?:This IO Expansion Shield is specifically designed to facilitate an easy connection between Arduino Nano and many other devices. Increase the DC power supply interface?: the actual power supply current of the USB interface on the NANO board is only 50MA, which is obviously insufficient to carry high-current devices such as servos, at this time the DC power supply interface to provide external power supply to ensure the stability of equipment operation. 14 input/output pins (servo type with GND, power and signal), 8 analog pins with power output and GND. 5 I2C expansion pins ?Package Included?: 2Pcs Nano I/O Expansion Sensor Shield See more

5 I2C expansion pins. 8 analog pins with power output and GND. 14 input/output pins (servo type with GND, power and signal),. Increase the DC power supply interface?: the actual power supply current of the USB interface on the NANO board is only 50MA, which is obviously insufficient to carry high-current devices such as servos, at this time the DC power supply interface to provide external power supply to ensure the stability of equipment operation. ?Nano I/O Expansion Sensor Shield?:This IO Expansion Shield is specifically designed to facilitate an easy connection between Arduino Nano and many other devices.