I did buy one unit from Summit Technology. Gold supplier. The unit was stolen but the earbuds, software and instructions were in the new box. They did not do signature confirmation and they placed a very high value on the customs form including shipping. So insist that your seller put signature confirmation on your orders! DHL gave my parcel to my neighbor who delivered it to me cut open with the unit missing. If I see them jamming over there, I'll surely know who dunnit! Also they only take Western Union or T/T. Not good and I did it at my own risk!