Using this 2.1mm DC Power Jack with Slide Switch is a breeze. First, plug your power supply into the jack. Make sure it's within the 16 VDC and 3A limit. Then, simply move the slide switch to turn the power on or off. When you're done using your device, switch off the power instead of unplugging it. As for maintenance, keep it clean and dry. Avoid using it in wet or extremely dusty environments. If you notice any issues like the switch not clicking properly, check the connections first. And remember, we also have a version with a rocker switch if you prefer that style.