Nano V3.0:Support ISP download,Using Atmel Atmega328P-MU MCU. CH-340 chip:not FT2322,greatly reduces the cost of the module. MINI USB port:V3.0 Nano ATmega328P Development Board With Cable,Type-C port no welding needed. Power:Support USB download and Power,Support for external 5V ~ 12V DC power supply.