"Description:\r\nbrand new and high quality.\r\nFeature:\r\nWith this item, it is easy to add an RS-485 interface to a PC via RS-232.\r\nNo power required, uses for TD as power source. This does not need any AC or for DC power.\r\nInterface: for for EIA/TIA RS-232C standard and RS-485 standard.\r\nWorking mode: Asynchronous, half-duplex, differential transmission.\r\nT-ransmission media: Twisted-pair or shielded twisted pair (STP).\r\nIt uses a particular pump to gain power from RS-232 signal (RTS, DTR, TXD) without initializing the RS-232 series interface.\r\nRS232 to RS485 Converter only, other accessories demo in the picture is not included! \r\n\r\nSpecifications:\r\nItem Type: RS232 to RS485 Converter\r\nMaterial: PC\r\nSize: 93x32mm/3.6x1.2in\r\nColor: As shown\r\nData Transfer Rate: 300-115200bps\r\nOperating Distance: 1200m for RS485, 5m for RS232\r\nEnvironment: -10-85/14-185, 5-95% RH\r\nQuantity: 1 Pc\r\n\r\nNote:\r\nNo retail package.\r\nTransition: 1cm=10mm=0.39inch\r\nPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage Includes:\r\n1 x RS232 to RS485 Converter":