DAB - I get a lot of stations through the DAB. Pretty much all that I enjoy listening too is available to me.
FM - I don't use this as much but it does it's job, the extendable antenna allows it to get a much clearer sound if necessary.
Bluetooth - Connect your phone or tablet and play your music / sounds through the speakers. It doesn't take long to connect, I find the bluetooth selection with August products to be good and when needing to connect again it's already there and instant connection.
SD card - There's a slot at the back that gives you the option to put a SD card there and play music off.
USB - Pretty much the same as above but you can use an USB memory stick or an USB cord to link a non bluetooth laptop or other product.
The bottom dial is your display - on or off.
I've had it for a few months now and I don't use it all the time most times when I'm in the bath & shower also while getting ready and the battery is still going. I gave it a little charge but it only took about 10 minutes, it's got a lot of life going.