The StarTech.com DVISPL1DD is a 1 ft (30 cm) DVI-D splitter cable for sending one digital video signal to two displays. It has one male connector for the source and two female connectors for display cables.
Both displays show the same mirrored image, so this cable is suited to duplicating a computer screen rather than extending a desktop or showing separate content. The passive splitter does not support DVI-Analog, and resolutions above 1920x1200 are not recommended. StarTech.com describes it as best suited to a PC with a DVI output; use with HDMI, DisplayPort or USB-C adapters and docking stations may not work.