I bought this DJI HDMI Output Module Part 54 for my Phantom 4 Advanced. About 1.5 years ago I bought this item for another drone and it was defective from DJI. When I ordered this product again, I was concerned. Of course it didn't work. Another defective HDMI module from DJI. However, this is DJI's fault, not that Luckybird supplier. This supplier's Luckybird customer service on return was quick and responsive. They delivered the goods to me quickly and I am satisfied. I only gave 4 stars because I think it's wrong to give 5 stars when the product was defective, even if it wasn't the fault of the seller I bought it from.