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TCG140-4E is a 4G LTE alarm and remote control, M2M, IOT, data logger, I / O with digital and analog, relay, Modbus
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Gsm 3g 4g Cellular Rtu Sms Relay Switch Industrial Iot Remote Monitoring System In-built Watchdog Sms Alarm Unit S150 - Alarm System Kits - AliExpress
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