The product is of excellent quality! Everything works well. I did not check only the flash drive. The HDMI works fine. Volume is super. You can also connect the column. Not all formats have sound. MP4, and Avi sound is. The better the video quality, the better the projector shows. The order was 10.02. 03.03 came. Packed well, no damage! The remote is working, there are no batteries, 2 little fingers are needed. I'll check the flash drive, I'll add a tip. In general, I am very happy with the purchase!!!