The Qolsys IQ Card-319 is a daughter card for the IQ4 NS (no screen) alarm panel. It allows the IQ4 NS to support legacy 319.5 MHz wireless sensors. The IQ4 NS will support up to one (1) of these 319.5MHz cards, along with up to one (1) PowerG daughter card. If you need to add 319.5 MHz sensor support to your IQ4 NS, and there is an open legacy SRF slot, then this is the card you are looking for.