Also, the delivery is very compelling and that in a good way because you do not unnecessarily Accessory immediately buys. Power supplies, car charger or other small items, the places I always in the box Jabra missing. There is a USB charging cable that is easy between mobile power supply (comes also in the car) and charging cable is plugged and offers an additional charging cable with micro-USB connector. The cable is long enough that you could also use it to load yet. I would have liked a little shorter. Not more or less is. A replacement strap for the ear might be something else, but because it is working as flexible and bends more, this should not break even. Incidentally keeps the headset with me even without ironing, but I feel as too uncertain.
Now I come to the general problems and why the headsets are often rated very bad because you should consider a few points. Bluetooth is analogous with the protocols HSP and HFP, therefore there is video noise, which are naturally calculated away by the reductions. Newer Bluetooth versions promise here no advantage, except that the energy consumption is reduced somewhat. However, this is only the case if both devices use the same protocol. Why not finally sets a standard for digital transmission, it is not clear. Although advertised with HD, but none of my smartphones offer an alternative transmission. Although A2DP is a digital audio profile for music and speech, works only on one side, ie only as a loudspeaker. If a call is made, the headset switches quickly into one of the analog protocols. Therefore expensive Bluetooth headsets make no sense because they do not sound or only moderately better. The manufacturers have evidently recognized, which is why the upscale class slips in the lower price segment more. 10 years ago you got for 20-50 euros just an absolute beginner model with excessive processing, which is now over.
In the small headset still will be added due to design that the microphone is not sitting in front of the mouth, but right side of the head. Further back, as a smartphone because shorter. This has to be compensated and the language has to be extracted from the room acoustics, partly with multiple microphones and appropriate digital signal processing. The manufacturers promise a lot, but can be used alone for physical reasons keep little. Headset with a microphone can bring advantages here because the microphone is closer to your mouth, but you gambled a little bit the advantage of compactness. This is certainly a matter of taste, but show reviews that do not really make this a quality growth.
Conclusion: Considering the above points, the M90 has a very good headset, especially for the price. Absolute plus is the media control (if you want to listen to music / audio books so), but it lacks the Talking Caller ID. The build quality is top, and the USB cable and omitting redundant power supplies is a big plus. Plantronics has clearly implemented the experiences of customers and adjusted accordingly.
