This device is really first class. Digital radio tuner. USB connection. AUX - IN - port and headphone port. Here simply lacks nothing. And all this at a reasonable price. The sound is also good. Thanks to the headphone jack, you can yes Connect an external sound system. Then goes off the post riiiichtig. My son used the Logitech Z323 2.1 Speaker System 30W RMS black. This sound system offers extremely good sound for very little money. Crystal clear buy recommendation !!!!