First, there has a notice in English (more or less). Besides, I had asked the seller who answered very quickly in this direction.
My first impression is to have on hand a toy, because of the quality of the plastic and the lightness of the device. (That said, my wife found it quite correct).
It is true that the use is not very intuitive. However, you get used to without too much difficulty. Look for product reviews, some of which give quite detailed explanations.
Having understood how to use it, the connection with Bluetooth devices (Samsung speakerphone and headset) is going well. I noticed a sort of noise like an engine, but just down the volume of the drive and increase the headphone to limit.
It's a shame that the sound of the video does not go through Bluetooth, but hey, the reader is not really suitable for video (screen too small and AMV format only). About the conversion to AMV software is supplied in the player's memory, and works well.
Overall, I'm happy with the player, which will make them much easier hiking (not wire that balance).