To use this Brightlink 8x8 HDBaseT matrix switcher, first connect your devices to the appropriate ports using a single Cat6 cable or HDMI. Since it doesn't come with a power supply, you'll need to provide your own. Make sure to choose a compatible power source for proper operation. When handling the switcher, be gentle to avoid any internal damage. Keep it in a dry and cool place to prevent overheating. Periodically check the connections to ensure they're secure. If you notice any issues with the device, double - check the power supply and connections before seeking further assistance.