Product Name:   3 IN 1 Pro Mini USB to RS232 Converter Module PC COM Bus Board for Arduino AVR

Packing list:  1 PCS 3 in 1 USB to Serial port Converter Description:
 
This is 3-function converter USB TO RS232 & USB TO TTL232 Converter & PRO mini downloader.

The USB driver IC is CH340, stable performance, fully compatible with USB1.1,USB2.0,USB3.0 , baud rate up to 256 kbps;

The  RS232 bus IC is SP232,this is Industrial grade RS232 conversion IC
USB to RS232 serial port, 3 pin pin assignment as below :   GND TX RX
 
USB to TTL serial port, 6 pin assignment as below :  GND 5V RXD TXD  CTS DTR
Compatible with PRO MINI download port
 
Uses : CH340 replace FT232 CP2102 PL2303 for Arduiuo Pro Mini Download
  
Size : 36mm x 14 x 12mm(Does not include USB ports )

Weight : 6g
    
 

Supports the following  OSes: