Retrofit an older drone with remote ID.

Today, I also received a small drone with all the modern features like return to home, follow-me, way point, and on and on. I guess I will have to read the manuals and watch the videos so it will be a while before I fly it, the weather is foul anyway, so it will probably be spring.
That said, I purchased a DJI Phantom P330D several years ago, but due to all the government regulations it was not legal to fly, as it did not have remote ID, though it is registered with the FAA and I took and passed the required TRUST course. As it cost several hundred dollars at the time I purchased the drone, I have been holding on to it. When the remote ID requirement was first implemented, I investigated ways to retro-fit the drone, but it was expensive.
At one point, I was thinking of disassembling the drone and selling the parts, but that would be a shame as the drone has only about two hours flight time. I decided to look at retro-fitting the drone again, and much to my surprise the cost had decreased dramatically! I found a Holy Stone remote ID module on eBay for $27, that also arrived today, and it took all of five minutes to program the module and edit my FAA registration. So, for 27 dollars, my 800 gram drone is now legal to fly again!
Programming the module was quick and easy, then all you have to do it apply it with Velcro and turn it on, presto, you are legal again.
Charging the module is through a USB port and a charge lasts five hours.