If you’re comfortable doing some wiring and installing custom device handlers, another alternative is to install a dumb relay wired into a contact sensor with secondary input. The acoustic sensor is a simpler option to install and configure, but this can be tucked away inside an electrical box if a clean look is important to you.
Another advantage of the acoustic detector, if you have CO detectors installed, is that it provides a separate CO alert based on the different beep pattern, while the FIrst Alert relay doesn’t distinguish between smoke and CO signals. If you have Kidde detectors, you can purchase separate relays and separate contact sensors to get both signals into ST.