The idea is good with installed radio, albeit inefficient. SD card reader, USB port and Bluetooth are actually points to buy the part. Now to the sound, which can each stereo for 100 euros more. If I turn off and the box via a radio outlet flutes are all stored settings. The 10 preset FM stations. Would the idea of better implemented eg RDS FM or DAB and the better sound (Price 100-150 euro) would I keep the part.