Quickly connect two PC serial ports with the patented Serial270 DB9 cable. This null modem serial cable allows two DTE or DCE devices to communicate with no conflict in data transmission. The 270anddeg; DB9 connectors on each end rotate side-to-side in almost a complete circle, allowing you to position the cable to fit your installation. The connectors feature detents, or click-stops, every 90anddeg; to ensure signal integrity is maintained.The oversized thumbscrews are slotted for easy connection to your equipment.The transmit and receive signals are crossed to ensure proper data transmission. With Serial270, the days of not having the right connector orientation on your cables are over!Connector 1: DB9 Rotating FemaleConnector 2: DB9 Rotating FemalePlease Note: Forcing the connector past the click-stops will break the connector and possibly damage the cable.