Using this Plura on-camera color viewfinder is easy. First, connect it to your camera using the provided connection cables. Make sure the connections are secure to avoid any signal loss. When using it, keep it away from direct sunlight as it might affect the visibility of the screen. For maintenance, use a soft, dry cloth to clean the screen gently. Avoid using harsh chemicals or abrasive materials. Also, store it in a cool, dry place when not in use to prolong its lifespan.