Four PC share one VGA/XGA monitor/projector or one PC connects to four video devices. This video switch has built-in 6-Pin mini-connector for sharing devices like Keyboard or Mouse but usage is optional. It is guaranteed up to 10,000 switching cycles, gold-plated contacts, metal case, heavy duty sealed rotary switch to prevent dust & moisture, and keyboard reset button. 5 Year Warranty. (Connectors: 5 Mini6 Female/5 HD15 Female)