99视频福利,97在线观看成人免费视频,狠狠婷婷,狠狠色综合久久丁香婷婷,久久精品国产福利,夜恋全部国产精品视频,伊人天天

SMS alarm is an Internet of things wireless data terminal, using public GPRS network to provide users with wireless long-distance data transmission. The product adopts high-performance industrial grade wireless modules and RS232 ports. Connecting to serial port equipment directly, CSD and SMS function.

1.        RS232 port built-in with 15KV ESD protection

2.        SIM/UIM card port built-in with 15KV ESD protection

3.        Power supply port built-in with reverse-phase protection and over-voltage protection

4.        Antenna port built-in with lightning protection

5.        WDT watchdog design, complete anti-drop mechanism to ensure data terminal is always online