Used an hour before returning to the store.
Unusable in my opinion, the background noise is very important and the tuning of the radio frequency far too imprecise. It moves one to two meters and must re-tuner frequency.
Acaht so bad, that I regretted relatively quickly.
Even to hear the tv is not usable, because the background noise.
I WILL HIGHLY RECOMMENDED. It is better to save for a numerical model, it will be free from background noise.