I purchased 3 models of this kit, they were all three great! nothing to report, delivered in individual cardboard boxes, sound, microphone, volume control OK I decided to take two (yes I quite consumes my kits ^^), received in plastic bags (that's not too serious, but it shows that the packaging is not the same). Both kits do not work properly! :-( means less to me, I hear a little microphone in my ear !!! and to top it all, when I go up and down the volume, it makes a loud noise (like tone beep) for me and my partner! I will try to contact them for a change, but since it dates, I think I have the bone ...
if it does not change the product, I can not recommend this product at all subscriber Russian roulette
EDIT.
Seller contacted and refunded product. I added a star for a refund on a slightly random product, it gives more desire to try his luck. +1 For the seller listening.