The term "the Internet of things" was coined by Kevin Ashton of Procter & Gamble，later MIT's Auto-ID Center，in 1999. The Internet of things (IoT) is the network of physical devices，vehicles，home ap-pliances and other items embedded with electronics. Software，sensors，and network connec-tivity which enables these objects to co-nnect and exchange data.

Everything of the IoT network is uniquely identifiable through its embedded com-puting system. Many experts estimate that the IoT ne-twork will consist of more than 30 billion objects or devices by 2020. What's more，experts also estimate that the global market value of IoT will reach 7.1 trillion dollars by 2020.

The IoT allows the devices and objects to be sensed or controlled remotely across existing network infrastructure. These devices and objects can collect and exchange useful data with each ot-her. Zhongxie Intelligence Technologies . Co . Ltd. Of Jiangsu Province is a specialist for de-veloping and producing the Public Ad-dress (PA) devices.

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Which is one of most global famous man-ufacturer of professional audio produ-cts in China. And it is also famous for its Cutting-edge technologies and high quality services. IoT broadcasting system is one of the audio products,and the IoT broadcasting system has the following features: All the devices and objects to be sensed or controlled remotely.

All the devices and objects can collect and exchange useful data with each ot-her. All the devices and objects can transfer analog and digital audio signal with low latency. All the devices and objects can encode hard digital IP audio with hardware. Transfer CD quality analog and digital audio signal within 20 milliseconds syn-chronously.

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So that,everybody has "zero latency" or "no latency" brodcasting experience. Distributed software/service and cross-platform architecture adopted. Angular B/S architecture adopted. Everyone can login and access the school broadcast address via browser/web or mobile applications of android or iOS anytime，anywhere.