The compact 4-Port Stackable Video Splitter (model TK-401S) clones or repeats your computer's viewing field to up to four monitors (this product does not extend a single viewing field over multiple monitors). Support for 1920 x 1440 pixel resolution ensures crystal clear image quality. Cascade up to three TK-V201S or TK-V401S units to add additional display monitors. Included is a 1.85m (6 ft.) VGA cable to connect to a computer. LED indicators on the front of the unit convey connection status. No software installation required simply Plug-and-Play to clone dazzling displays.