I tried to keep this video short and sweet but I can add a bit more meat to the bones below!

I have recently bought the DJI Action 4 and I had also spent about £52 on the official adapter that plugs into the side of the camera and lets me connect a wired lavalier mic (lav mic) from my crash helmet as well as let me connect the camera to a power bank at the same time.

Then I saw that the new standalone DJI Mic 2 had just come out and this promises to allow me to connect it to the Action 4 wirelessly, thus removing one lav mic & cable (plus the adapter I just bought...) out of the equation

However it must be said that I have a certain way of doing my motovlogs.. as a rule I am not the type of motovlogger who keeps starting & stopping their cameras while out on a ride. I like to "set and forget" meaning that start recording at the beginning of a ride and stop at the end, which is why I use a power bank. And yes... that means I have many, many terabytes of video footage!

So, knowing that the Mic 2 had internal memory and could record for hours at a time, I had hoped to be able to start recording on the mic and then shortly after start the Action 4, have it connect to the mic and start recording on that *whilst still recording on the Mic 2*. Then, if I do stop the camera for some reason (stopping for lunch for example), I could restart the camera later, continue recording and all the while, I still have the backup audio track in the mic to fall back on.

Also, if I forget to press Record on the Action 4, with the back up audio, I could perhaps sync the Mic 2's internal audio to the one or two other cameras I usually have running on my motorbike anyway. All my problems are solved, right? Well, wrong; it turns out that this configuration is not possible if the Mic 2 is recording internally when it reconnects to the Action 4, then that internal recording is stopped.

It's because the connection between the two devices is Bluetooth and the Mic 2 cannot continue recording while a Bluetooth connection is initiated.

Funnily enough, if I press record on the Mic 2 after the connection to the Action 4 is made, that's fine and I get an internal recording... until I happen to turn the Action 4 off and then on again later, and the Mic 2 stops recording again. It's a shame that DJI couldn't fid a way to use Bluetooth LE (Low Energy) to keep the two devices connected, but then that would take a toll on battery life on both the camera and the mic.

There is a feature on the Action 4 called Audio Sync which makes sure that the camera & mic start and stop recording at the same time as long as they are already connected. This is probably what I'll end up using but I really didn't want to stop the Mic 2 at all once I started.

I have used external audio recording solutions in the past (I have a Zoom H1n and a number of 1into2 audio splitter cables!) but I had hoped that this would be a more compact solution to my backup audio needs with fewer cables to worry about.