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The Honeywell 4219 is a wired zone expansion module that provides up to (8) additional hardwired zones of protection for a Honeywell VISTA-15P, VISTA-20P or VISTA-21iP alarm panel. The module is used when a system runs out of terminals to support new sensors. Buy the 4219 expander here.
Upon obtaining damaged items during purchase, the customer may receive another item in exchange
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