Well, our first and our second Victron 712 monitors were not Bluetooth enabled, so we had to drill and mount the thing in a manner that allowed us to monitor it and make changes. Neither one of the mounts were especially attractive - even to a techie. We found the digital monitor screen hard to read unless you readily understand the abbreviated language of digital displays. And, making program changes were a real challenge.
No, you don't need Bluetooth, but with it, one can mount the unattractive 712 monitor where the sun doesn't shine. It's easy - our third and present 712 monitor lives under the Ollie's dinette seat. Monitoring it via Bluetooth is quick, simple and can be done from anywhere nearby - that's important when you're switching things on/off to see how much energy it draws. Most importantly, making edits to the program via Bluetooth is Sooooo simple.
So, while it's true that you don't need Bluetooth, anything and everything I buy will probably have it. The Ollie is an exception, but that too will soon have Siri, Google or Alexa integrated into it's systems. Ask ChatGPT what it thinks ð
Charlie.