The small cube has no radio or SD card slot, just jack and Bluetooth - I use eh only the latter, so that now bother me that not very, but who want a radio, should rather resort to another model. Alternative - I usually use the radio app that has better reception and no noise anyway, as most stations have unfortunately often with us in the country, when you hear about antenna.
The cube is operated by 4 buttons on the top, 2 buttons are assigned twice - back and forth are the same to make louder and quieter when they are pressed for more. I personally find less than optimal, but I control most eh via smartphone, then it does not bother.
You can use the cube as a speakerphone, this is extra a button on top of the unit, but you should be aware about it, that this is just as loud as the music was.
The sound I find amazingly good, just the bass that are lost with most small appliances due to the lack of volume, are really good here and listening to music is so great how. From a much larger speaker
5 stars for the miracle cube. Great sound and a super powerful battery, you can really recommend it to the cube.