Tuya APP 433MHz Wireless WIFI + GSM Auto-dial Alarm Security System LCD Display

One Set Of Tuya Alarm Host A External wired alarm connectors: 1 channel external wireless siren, 1 channel. Wireless Frequency ：433MHz. Siren output：<500mA. Emission Frequency：433MHz. GSM system：850/900/1800/1900MHz.

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