1.Nano V3.0 card is 100% compatible with the Nano card, and fully compatible with Windows, Mac and Linux operating system. 2.It uses the chip ATmega328P CH340 instead of FT232RL. You can start with various electronic projects by using the Arduino software (IDE). It has everything that Arduino/Genuino UNO has, even with more analog input pins and onboard +5V AREF jumper. 3.It can be powered via USB connection, 7-12V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). 4.Nano CH340 controller is a compact board similar to the UNO, smaller and breadboard-friendly than Diecimila. 5.Using Atmel Atmega328P-AU MCU, Support ISP download; Support USB download and Power.