This serial cable by Delock is a full handshake null modem cable with RTS / CTS and DTR / DTS data flow control. This cable offers the possibility to connect RS-232 devices directly with each other.These cables fit any RS-232 port, as the mini D-Sub 9 connectors (44 x 33.3 x 15 mm) are small and compact. In this way, RS-232 connections can be used next to each other.