Using your Cort C4 Deluxe Electric Bass Guitar is easy. First, make sure your amplifier is properly connected. Plug in the instrument cable to the output jack of the bass and the input of the amplifier. Then, adjust the volume and tone controls on the bass and the amplifier to get your desired sound. When you're done playing, unplug the cable gently. For maintenance, keep your bass in a cool and dry place. Wipe the strings with a clean cloth after each use to remove dirt and sweat. This will also help to keep the tone clear. Check the tuning pegs regularly to ensure they're tight and working properly. If you notice any issues with the hardware like the bridge or pickups, it's best to take it to a professional guitar technician.