The instructions mentioned by lolita above are pretty much standard functions of the buttons. Majority of these players have the same chipset so the buttons function the same. It just looks different and the buttons are in different places.
If you can't find the manual, I would say, play around with your player and familise yourself with the buttons and navigation. If there is something you can't do, then you are more than welcome to ask here on the forum
. There are lots of people with these players (myself, I have over 10 different player!) and we're all more than happy to help out.