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2U 8HDDs Intelligent Video Surveillance Server.
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Dual-Frequency Glass Detection: Detects high- and low-frequency glass break sounds for accurate alerts.
Wireless Two-Way Communication: Secure AES128 encryption with frequency hopping for stable signal transmission.
Detection Range: Up to 9 m (29.5 ft) for indoor glass surfaces.
Alarm Inputs: Two channels (NO/NC) for external wired sensors.
Power Supply: CR123A battery (up to 3-year life).
LED Indicator: Visual confirmation of alarm or fault status.
Operating Temperature: –10 °C to +55 °C.
Indoor Installation: Compact, surface-mount design.
Certifications: CE compliant for safety and reliability.
Integration: Works with Dahua wireless alarm systems for smart security management.
The Dahua ARD821-W2 is a compact wireless panic button designed for Dahua alarm systems, allowing users to send an instant emergency alert when pressed. It is ideal for homes, offices, shops, and reception areas where quick alarm activation is important.
The device uses two-way RF communication to ensure reliable signal transmission and confirmation from the alarm hub. It features LED indicators for status and battery alerts, plus protection against accidental presses to reduce false alarms. Its small, portable design allows it to be carried or wall-mounted for easy access.
With secure encrypted wireless communication, long transmission range, and long battery life, the ARD821-W2 provides a simple and dependable way to trigger emergency alarms within a Dahua wireless security system.
Supports 150 wireless peripherals (6 sirens, 64 keyfobs, and more)
Peripherals status display: signal strength, battery level, temperature, program version
Network options: Wired, Wi-Fi, 4G, 3G, GPRS
Dual SIM, single standby for uninterrupted connectivity
Automatic Network Replenishment (ANR) ensures continuous connection
Video linkage via mobile app (DMSS or COS Pro)Two-way wireless communication with frequency hopping for stability
Cloud updates with automatic recovery in case of failures

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