I should start by saying that my review is about the device in black color.
Among its advantages, we could mention the automatic call recognition from the power of the telephone network (No need to put batteries, don't waste time looking for the slot for them).
As for its disadvantages: The hook of the headset sticks excessively, making it difficult to open the line to call your interlocutors or vice versa to hear them. The same happens with the cable, although its length is considered favorable, it has lost signal stability.
That's all I had to say, short and sweet.
Think carefully before purchasing this particular model and if possible, choose something else.