If you have the Omni II Version 2.8 or older and want to expand with the OmniTouch, you'll need this upgraded firmware chip. The Omni II Version 2.9 firmware adds the following new features: HAI Lighting Control (HLC) integration and support Programming command to toggle a unit Programming support for additional UPB Link triggers UPB and LutronRA Upgrade EEPROM for Omni II. Requires PCS PIM module and HAI 10A17-1 Serial board for UPB.