Using this Kramer VP719XL switcher is easy. First, connect the power supply that comes with it to make sure it has power. Then, connect your input devices to the 7 input ports. You can switch between different inputs as needed during your presentation. When not in use, turn it off to save energy. Keep it in a dry and cool place to avoid damage. Regularly check the connections to ensure they are secure. If you encounter any problems, contact customer support.