The ZX 300 is classified by the voice quality was very good. Unfortunately the mic after 2 days lost already its sheath and was exposed. The return was too expensive to me at this low price, so I unceremoniously grabbed the glue bottle and mustered a quarter drop of a good plastic glue. Now the damage is certainly not happen again. I'll probably let me get such a part to not always having to reposition. Conclusion: The device is highly recommended. The price is OK and the received sound very pleasant.
