Look no further. Amazing product quality， that's solidly built. Best of all， its very affordable price. Buy instantly.<br />- Interface: Compatible with ELA RS-232 standard and RS-485 standard <br />- Electronic interface: At the siade of RS-485 is a DB9 male (pin-type )connector with connection board <br />- Working mode: Asynchronous， half-dupiex， differential transmission <br />- Transmission media: Twisted pair or shielded twisted pair(STP)<br />- Transmission rate: 300-115200bps <br />- Mechanical dimension: 95mm x 33mm x 17mm<br />- Working environments: 0~70℃(485-A)， -20~58℃ (485-C). Relative hunidity 5％~to 95％ <br />- Transmission distance: 1200m(RS-485)， 5m(RS-232)<br />1 x Converter <br />1 x User Manual <br />In original package<br /><img src="http://img6.eachbuyer.com/x10/p99/zl49_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x10/p99/zl49_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x10/p99/zl49_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x10/p99/zl49_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x10/p99/zl49_5.jpg" />