One caution: HDMI module on RC has mini HDMI port. Even battery pack for Mybud has mini HDMI port. You need a mini HDMI to mini HDMI cable which I could not find it. I used the cable provided by Mybud which is mini HDMI to HDMI cable. You need an adaptor to convert mini to HDMI. It comes with Mybud. But the caution is don't use that adaptor on HDMI module side as it puts lots of pressure on the module and I'm afraid module might fail. Better use adaptor on battery side. I bought a mini HDMI to HDMI extra thin cable from Amazon to further reduce load of module and thin cable is more flexible.
I switched over from iPad to iPhone now and it makes me help mount iPhone on battery and battery is mounted on RC holder. Mybud gets plugged to battery with a special connector. This makes things tidy.