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In 2003, Plantronics introduced the CS50 wireless headset for use on office phones. Since that time, Plantronics has manufactured other wireless headsets, including the "CS70N", [11] CS500 Series, and Savi 700 Series. In recent years there has also been strong focus on Unified Communications headsets and speakers. [12]
Wired or wireless: If you're looking for a fully wireless option, most modern soundbars support Bluetooth, though not all TVs do. My advice is to go wired, as you'll ensure the best audio quality ...
The Xbox 360 Wireless Headset is a wireless headset designed for the Xbox 360 and Xbox Live; it is manufactured by Microsoft. It can be used for in game voice chat, private chat, audio for video chat and in game voice recognition. Up to four wireless headsets can be used simultaneously on a single Xbox 360.
Push-to-talk cellular calls similarly provide half-duplex communications – while one person transmits, the other(s) receive. This combines the operational advantages of PTT with the interference resistance and other virtues of mobile phones. Manufacturers of (POC or PoC) hardware include ToooAir [1] and Hytera US Inc. [2]
When the data were reanalyzed using case-crossover analysis, RR was calculated at a much higher 5.13. The authors expressed concern that misclassification of phone call and cell phone usage due to reporting errors of the exact time of the collisions was a major source of bias with all case-crossover analysis of this issue. [3] [4] [11]