This Allen & Heath ME-U monitor hub doesn't come with an input card. You'll need to buy one for it to work. It includes the correct power supply. But be aware, the rack ears are bent.

To use this Allen & Heath ME - U monitor hub, first, make sure you have purchased an input card as it doesn't come with one. Connect the hub to the correct power supply that is included. When installing, keep in mind that the rack ears are bent, so you may need to adjust them carefully. As for maintenance, regularly check the power connection and the overall condition of the unit. If you notice any issues, contact the customer service for further assistance.