Specifications:

Feature:
With this item, it is easy to add an RS-485 interface to a PC via RS-232.
No power required, uses TD as power source. This does not need any AC or DC power.
Interface: Compatible with for EIA/TIA RS-232C standard and RS-485 standard.
Working mode: Asynchronous, half-duplex, differential transmission.
T-ransmission media: Twisted-pair or shielded twisted pair (STP).
It uses a particular pump to gain power from RS-232 signal (RTS, DTR, TXD) without initializing the RS-232 series interface.
RS232 to RS485 Converter only, other accessories demo in the picture is not included!

Specifications:
Item Type: RS232 to RS485 Converter
Material: PC
Size: 93x32mm/3.6x1.2in
Data Transfer Rate: 300-115200bps
Operating Distance: 1200m for RS485, 5m for RS232