This 8 - channel input expander does not come with a power supply. It offers great expansion functionality for your system.

To use this 8 - channel input expander, connect it to your existing system as directed. Since it doesn't have a power supply, make sure you have a suitable one on hand. When using, keep it in a dry and clean environment. Avoid exposing it to extreme temperatures. For maintenance, simply wipe it with a soft, dry cloth regularly. Don't try to open the device by yourself, as it may void the warranty.