I believe that soon we will be able to consider not only all sorts of things like checkpoints under consideration sets, but also more interesting solutions, such as a home multimedia center, a headset with the support of multipoint connections, modems, laptops and so on. But now let's dwell on the new car headsets, do not be afraid of so far from each other indexes - HF-310 differs from the HF-510 is not as heaven and earth. The latter is an advanced solution that is OLED-display to display the numbers from, like, there's even the possibility of dialing with the headset. But if you talk about the other basic parameters, then the quality of communication, and work time, and equipment are similar as two drops of water. This, incidentally, also applies to the appearance, except for the display device are the same. Well, let's talk about how the headset works, and then move on to the cover.