Using this power supply is straightforward. First, make sure the power supply is brand new and in good condition. Connect the input to a 240VAC power source using the provided PAL coaxial connector. Then, connect the output to your TV masthead amplifier using the other PAL coaxial connector. When using it, always remember that different masthead amplifiers need different power supply voltages. So, check your amplifier's brand and model before you start the connection. The required voltage is usually written inside the amplifier unit on the antenna mast. If you're not sure, reach out to us. As for maintenance, keep it in a dry and cool place. Check regularly for any signs of damage like frayed wires or loose connectors. If you notice a short - circuit, immediately disconnect the power supply to avoid any further damage.