The StarTech 4-Port HDMI Automatic Switch is a versatile audio/video device that allows users to easily switch between four different HDMI sources with the touch of a button. With support for 4K resolution, this switch is ideal for users looking to connect multiple devices to a single display. The StarTech VS421HD4K model ensures high-quality performance and reliability, making it a practical choice for home entertainment systems or professional settings. No 5v power supply