Tuya APP Wireless WiFi GSM GPRS Home Office Security Alarm Burglar System+Alexa

One machine two networks - Support WIFI/GSM/GPRS/2G. Also work with Amazon Alexa. Uninterrupted network, safer and more assured. Built-in alarm siren: 110dB. GSM network frequency : 850/900/1800/1900mHz Support 2G GSM network.

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