This product is just not good. First off, the Bluetooth function will not work with an iPod nano, so be aware of that when purchasing. When you are using the aux cable to play your music, the quality will be static-y and poor. Move the player or iPod at all and you get a lovely blast of loud static.
Perhaps the worst thing is the super loud, obnoxious voice that you have to hear every time you turn the device on. This would be no big deal if you could turn it down, but you can't. It just screams at you every time you turn it on. A lot of times I want to use a portable music player so I can quietly listen to my iPod in bed or in the morning while doing chores without bothering anyone. This makes that literally impossible.
There are plenty of other options that are much better for similar prices, so pass this one up.