Great news for GX7 owners. I just bought the Yongnuo YN560 III flash ($75) with the Yongnuo RF602C3 radio-wave transmitter/receiver package ($37) for my Lumix GX7. It works! You don't need the receiver, but you can't buy just the transmitter. For $37 for both, I'm not complaining. I'd read some reports some saying the RF602 would work and other saying it wouldn't. I'm guessing that the Nikon version might not work, but the Canon (C3) version does. I also read that the RF603 transceiver would also work, but you must rewire the dang thing. With the RF602C3, you don't. And, the RF602C3 is small and looks nice on the GX7 body. The only minor problem is getting the transmitter onto the hot shoe. You have to use a flat blade to push the pins in as you slide the transmitter on.