UTEK UT-2209 RS-485 Photoelectric Isolation Data Repeater Standards: RS-485 TIA/EIA  Connector: RS-485 2 bits terminal block input RS-485 2 bits terminal block output Protection: RS-485 provides with 600W lightning, surge, 15KV ESD protection each line  Working mode: asynchronous half-duplex LEDs for indicating PWR TXD, and RXD activity  Transmission media: twisted-pair or shielded cable Baudrate: 300BPS-115.2K BPS  Dimension: 79mmX74mmX22mm  Operating temperature: -40 to 85 Relative humidity: 5% to 95 %( Non-condensing)  Works with all communication software, plug & play  Transmission distance: 0-1,200m (115,200bps-9,600bps)