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What's the difference between using SMS and Bluetooth?
The use of mobile phone Bluetooth: support voice and data transmission; Using radio technology, the transmission range is large, which can penetrate different substances and spread among them; Frequency hopping spread spectrum technology is adopted, which has strong anti-interference and is not easy to eavesdrop; In theory, there is no interference problem when using spectrum that is unrestricted in all countries; Low power consumption; Low cost. Disadvantages of Bluetooth: slow transmission speed.
Technical performance parameters of Bluetooth: the effective transmission distance is 10cm~ 10m, and the increased transmission power can reach 100 m or even more. The transceiver operates at 2.45GHz and covers 79 channels (2.402GHz to 2.480GHz) at the interval of 1MHz.
Advantages of using SMS: Compared with calling, using SMS has many advantages. Its main advantages are: convenient confidentiality, relative accuracy, breakpoint continuous transmission, mass transmission function, low cost, privacy, non-repudiation, high efficiency and so on.
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