105dB Built-in Siren 3. Longer Battery Life. Built-in Siren & Buzzer. This product link is for the WIFI version, if 2G/4G is required. 200 Accessories Supported 9. Built-in 10 Languages. The alarm system supports adding 200 accessories, such as smoke detectors, outdoor wireless sirens, water leak detectors, gas detectors and more.
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