• Fully Compliant with USB Specification v2.0 (Full-Speed) 
• UHCI / OHCI (USB1.1), EHCI (USB2.0), xHCI(USB3.0) Host Controller Compatible
• Meets EIA/TIA-232F standards
• Guaranteed 1000kbps transmission rate under loading
• Three RS232 Driver / Five RS232 Receivers
• Full-duplex transmitter and receiver (TXD and RXD)
• W / O Six MODEM control pins (RTS, CTS, DTR, DSR, DCD, and RI)
• 5,6,7 or 8 data bits
• Odd, Even, Mark, Space, or None parity mode
• One, one and a half, or two stop bits
• Parity error, frame error, and serial break detection
• Programmable baud from 75 bps to 1M bps
• Provides RS232 power down indicator pin
• Works with existing PC COM Port software applications
• Automatic software flow control with XON/XOFF
• Provides royalty-free Virtual COM Port (VCP) driver for:
• Windows 2000, XP, Vista, and 7(Microsoft Certified WHQL Logo Drivers)
• Windows Server 2003, 2008, 2008 R2
•  Windows 8
• Windows CE4.2, 5.0, 6.0, and Windows Embedded Compact 7
• Windows XP Embedded (XPe), Point--of-Service (WEPOS), and POS Ready
• MAC OS 8/9, OSX
• Linux/Android kernel 2.4.31 and above includes built-in driver
•  -40C to 85 C Operating Temperature
• ESD Protection for RS-232 I/O' +-15KV
• RS-232 for DTE Mode use PL2303RA Chipset
• Weight : 35g
• Length : 1m 

• Audio Pin assignment

Pin1 : RXD  <== IN

Pin2 : TXD   ==> OUT

Pin3 : GND

DTR    ==>  DSR

 RTS   ==>  CTS

DCD and RI  ==  NO USE