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Dahua DHI-ARD821-W2(868) detector/sensor
Wireless panic button > Two-way radio frequency communication. > Has multiple LED colors to indicate different states. > Cloud update and automatic recovery after an update failure. > Provides protection
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Type
wireless panic button
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Protection
IP54, against accidental pressing
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Frequency
868MHz
Specifications
- Type
- wireless panic button
- Protection
- IP54, against accidental pressing
- Frequency
- 868MHz
Dahua DHI-ARD821-W2(868) wireless panic button — a compact emergency call device for quickly alerting security or emergency services with a single press. The device is protected to IP54 class and equipped with a mechanism to protect against accidental triggering, ensuring reliable operation in everyday conditions without false alarms. Two-way radio communication at 868 MHz guarantees delivery of the signal to the security panel with confirmation.
Advantages
- Instant call with a single press — in an emergency there is no need to search for a phone or dial a number, just press the button
- Protection against accidental pressing — the structural protection prevents false alarms during everyday carrying or storage
- IP54 protection class — resistance to dust and water splashes for use in various conditions
- Multi-color LED indication — quick visual check of the button status and quality of communication with the panel
- Firmware update via the cloud — automatic recovery ensures constant device readiness
- Wireless communication 868 MHz — freedom of placement without running cables and mounting at fixed points
Applications
- Banks and jewelry stores — a hidden panic button at the workplace of a cashier or salesperson
- Medical facilities — emergency staff call by a patient or employee
- Lonely elderly people — a personal help button at home
- Protected facilities with the Dahua wireless system — an additional line of manual notification
Frequently asked questions
How to protect against accidental triggering in a pocket?
The device provides structural protection against accidental pressing — the button requires a deliberate press with a certain force.
Does the system confirm receipt of the alarm signal?
Yes, two-way radio communication ensures confirmation of signal delivery to the security panel, which is indicated by the LED indicator.
Can the button be carried outdoors?
Yes, IP54 protection provides resistance to water splashes and dust, however the device is not intended for full immersion.
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