SPON Global--IP Intercom & PA System

Intercom and PA  In The Prison
The prison is a particular place that mobile phones and other electronic devices are forbidden to be taken in, making it inconvenient to communicate; then how to make sure of the s...
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Changsha SPON Communication Technology Co., LTD was established in 2002 with over 20000 Square meter workplace . It is a national high-tech enterprise which has own core intellectual property and innovative research & development capabilities. We have rich experience in IP video and audio products and PA system products.
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