This is a compact and convenient VGA bi-directional manual switch. It allows 2 PCs to share a VGA display, or switching 1 PC between two displays. Designed for securities market, education, public system, video broadcast system and other environments. Plug and play, no power supply needed. Package Includes VGA Switch and User Manual. Note: This VGA switch cannot send one VGA signal to 2 monitors at the same time (NOT a splitter). For such function, search ASIN B00L3W1OLS for a VGA splitter.