The nec headset is wireless and features near field wireless communication. It is a wireless technology initiated by Philips and jointly promoted by Nokia, SONY and other famous manufacturers.
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Evolved from the integration of contactless Radio frequency identification (RFID) and connectivity technologies, Nec combines inductive card readers, inductive cards, and point-to-point capabilities on a single chip to enable identification and data exchange with compatible devices at short distances. This technology was originally just a simple combination of RFID technology and network technology, has evolved into a short-range wireless communication technology, and the development trend is quite rapid.