Can still be set to use 3.3V power and logic by soldering a jumper on the bottom.
Upgraded USB to serial converter from CP2104 to CP2102 - same great reliable drivers!.
Additional STEMMA QT port for plug and play I2C connections.
Same pinout and size, same mounting hole locations - drop-in compatible!.
Same ATmega328 chip, running at 16 MHz, which makes it compatible with all Arduino UNO based libraries, codes and examples.
It still features the ATmega328 chip and is drop-in compatible with the original METRO Mini, but has many upgrades and improvements: The V2 is a significant redesign, enough, so we consider it a completely new product.