Will the belting 5v communicate with the Motorola rmu2040. I am looking for an c cheaper alternative. If not, any recommendations?

Do you mean the Baofeng UV-5R?

You can keep asking this question on multiple threads, but the reason for the lack of response is - aside from the fact it is the holidays - the answer is “it depends.”

It depends on the frequencies that the Motorola has been programmed to, and it depends on whether the UV-5R is Part 90 certified (and has the appropriate FCC label affixed.) It also depends on the rules of the country you live in.

If you are in the U.S., then the probable answer is - it might work, but is not legal.

You are trying to get a cheap Chinese-made amateur radio to talk to a business-class radio. They are intended for two completely different purposes. One is a HAM radio, and the other is a business radio. If you bought the cheap HAM radio with the intent of trying to talk to an expensive business radio, then you bought the wrong product.

These Chinese-made radios are NOT “walkie-talkies.” They are professional-quality “amateur” (HAM) radios. They are not intended or legal to use on any frequencies outside the HAM bands, and only by licenced HAM operators.

So without knowing what frequencies the Motorola is programmed for or knowing what country you live in, it is impossible to answer your question.

I’m not sure the Baofengs were ever intended to be amateur radios? Just a wideband, multi0function product for all kinds of worldwide markets. In fact, it’s programming system is decidedly un-amateur in it’s operation. As a worldwide product, then territory specific certification might be possible. They are walkie talkies - a generic term for hand held radios, used for generation to denote expensive, quality products and cheap tat aimed at children.

In terms of compatibility it’s a matching exercise based primarily on frequency, mode, bandwidth plus signalling systems. You can program an expensive quality product to work with the cheap tat. What you cannot do is easily meet technical standards. You can usually make the equipment work 100% fine. You cannot stick any essential approval numbers on them - because that needs testing and proper approval, and of course cost. In the UK, for example, the free to use PMR446 system has loads of users with Baofengs on the channels. None legal, because the only approved radios must in addition to the power restrictions, have a no-premoval antenna. This one feature makes the Baofeng illegal. It doesn’t cause any real operational issues. I understand the systems in the US are very similar, again with restrictions.

In real world use, the issues with products like the Baofeng come from areas such as toughness, reliability, materials, and lifespan (and of course resale value), but that is about it.

Please remember to operate within regulations. This includes having proper licenses and being aware of the frequencies each radio service authorizes. Legal operation is encouraged here. Illegal operation discussion gets threads closed.