steps
what you'll need: USB + RatPac firmware portal/app (the receiver is USB-powered)
1Log in to firmware.ratpaccontrols.com and download the Cintenna firmware.
2Connect the Cintenna via USB.
3Apply via the firmware portal/app (see RatPac's Cintenna 2 Quick Start Guide + CRMX2-compatibility tutorial video).
GotchaPortal login required; version history not public. GotchaIt's a receiver, firmware mainly governs CRMX/CRMX2 protocol compatibility, which must match the transmitter side.