Using this 2x1 HDMI Switcher 4K60 with Multi - Viewer is a breeze. First, connect your HDMI sources to the input ports of the switcher. Then, connect the switcher's output port to your display device. You can switch between different sources easily. When it comes to maintenance, keep it in a dry and cool place. Avoid exposing it to direct sunlight or moisture. Also, make sure to turn it off when not in use to save energy and prolong its lifespan. And always handle it gently to prevent any physical damage.