ITEM NAME:Mini USB CH340 Nano 3.0 ATmega328P Controller Board For Description: 14 digital input/output ports, TX, TX, D2-D13 8 analog input ports: A0-A7 1 pair of TTL level serial port transceiver port RX/TX 6 PWM ports, D3, D5, D6, D9, D10, D11 Using Atmega328P-AU microcontroller Support USB download and power supply Support external 5V-12V DC power supply Supports 9V battery power Support ISP download Three power supply modes: USB, VIN, external 5V input Package Includes: 1x Nano V3.0 Development Board Note: Download/use method: 1. Download the IDE: https://.cc/en/Main/Software 2. Download the USB chip driver: https://wch.cn/downloads.php?name=proamp;proid=65 Foreign customers download address: https://www.wch-ic.com/download/list.asp?id=126 3 plug in NANO development board, the driver will automatically install 4. Select board NANO in die 5. Select COM port, this can be queried on my computer, just inside your uno board 6. First select, 's own routine program, burn into it.Select board NANO in die. Supports 9V battery power. Select COM port, this can be queried on my computer, just inside your uno board. 1 pair of TTL level serial port transceiver port RX/TX. People always bought together with.