Allows 75ohm COAX device to communicate via twisted pair. Transmission signal: ITU/CCITT G.703. Bi-Directional Signal Conversion. Data transfer rates: 0 - 2.048 Mbps. 75 Ohm end: dual COAX BNC female connectors. (TX & RX) 120 Ohm end: standard 8P8C Shielded RJ-45 socket. Link-to-Data isolation: 500V AC/DC. Operating Temperature: 0 C to 50 C Case Dimensions: 66mmX42mmX21 mm. Package content: 1X Brand New G.703 Balun BNC to RJ45 Ethernet Adapter.