This AEM 22-Channel CAN Expander Module is perfect for car owners who want to upgrade their dash displays. Whether you have a carbureted vehicle or existing CAN-based devices, this module lets you add more data channels for viewing and logging. For example, if you're into racing and want to keep track of more engine parameters, this module is for you. It takes analog, digital, and frequency inputs and turns them into a signal that can be sent to CD Dashes. Currently, it's only compatible with CD Dashes, not other AEM devices or 3rd party ECUs or loggers. There isn't information about its size or weight, but it's a great addition for automotive data enthusiasts.