Check the listing for details. DSC PowerSeries NEO HSM2108 Expansion Module+PCL-422 Module FAST FREE SHIPPING a. Condition: Used. Listed at 29.00 USD. The DSC PowerSeries NEO HSM2108 Expansion Module is a unit designed to enhance the functionality of alarm systems. With its reliable brand reputation and specific model number, the module offers a seamless integration with the DSC PowerSeries NEO system. Whether used for business or personal security purposes, this expansion module provides added convenience and peace of mind knowing that your surveillance and alarm equipment is up-to-date and efficient. And with the added bonus of fast and free shipping, you can quickly and easily upgrade your alarm system to the next level.