Two-Way Radios (Monitoring IIS)

I am looking for a set of radios to monitor my IIS (Ignition Interlock System) when I am warming up my car on cold mornings. Some people use a baby monitor but the problem I am finding on most setups is that the parent unit is battery operated but the baby unit is AC powered. What I am specifically wanting is to have the radio/walkie talkie that is in the car placed near the IIS to be “always listening” so I know when the re-test begins and starts the 5 min. countdown. Does anyone know of any low-cost (around $20-$30) radios (preferably on Amazon) that let me set one of the units to always listen like a baby monitor without having to push the talk button to monitor sound? I have considered forcing the button to stay pushed in with glue or wrapping something around it but if it becomes un-pushed or malfunctions and I don’t hear it, I will get a violation.

Any leads would be greatly appreciated!

https://www.amazon.com/Retevis-Monitor-Private-Channel-Rechargeable/dp/B00GMESUIC

I found these but they are 2x the price I am wanting to spend. I will probably get them If I can’t find some that are cheaper.

Found one in my price range :slight_smile: I will leave this topic up for others that want to monitor their IIS remotely. (Admins - Feel free to take this topic down if it violating your posting guidlines)