Dahua Technology
ARD821-W2-868 - Single Button Wireless Panic Button 868MHz - Dahua
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Dahua - ARD821-W2-868 - Single Panic Button - Wireless - 868MHz two-way frequency - Range up to 1,400m in open space - AES128 encryption - Light indicator - Cloud Update - Battery level display on app - Low battery detection - IP54 protection - Polycarbonate and ABS - White color.