Specifications: Product Name: RJ45 to DB9 Cable
Connector on First End: 1 x RJ-45 Male
Connector on Second End: 1 x 9-pin DB-9 Male
Conductor: Copper
Compatibility: DTE Equipments
got this to connect my laptop to an RS-485 modbus line for testing a micro-controller. needed the TU-S9 plus a separate RS-485 to RS-232 converter, but to my great surprise it all worked on the first try.