Description: Brand new and high quality. Feature: This RS-232 to RS-485 converter easily adds an RS-485 interface to your PC via RS-232. No external power is required, it utilizes TD as a power source, eliminating the need for AC power or an external power supply. Interface: Compliant with EIA/TIA RS-232C standard and RS-485 standard. Working Mode: Asynchronous, half-duplex, differential transmission. Transmission Media: Twisted-pair or shielded twisted pair (STP). It uses a special pump to draw power from the RS-232 signal (RTS, DTR, TXD) without initializing the RS-232 serial interface. RS232 to RS485 Converter only, other accessories demo in the picture is not included! Specifications: Item Type: RS232 to RS485 Converter Material: PC Dimensions: 93x32mm/3.6x1.2in Color: As Shown Data Transmission Rate: 300-115200 bps Operating Distance: 1200m for RS485, 5m for RS232 Environment: -10-85 ℃/14-185 ℉, 5-95% RH Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x RS232 to RS485 Converter