Botão de pânico sem fios DAHUA ARD822-W2(868) — botão de alarme a pilhas, 868 MHz, branco

The DAHUA ARD822-W2(868) is a battery-powered wireless panic button that operates at 868 MHz and integrates with compatible alarm panels. Housed in a compact white enclosure, it offers a manual trigger for emergency situations and is suitable for locations that require a quick method to send an alarm, such as homes, offices and care facilities.

Advantages

This panic button supports two-way RF communication for reliable signalling and provides multiple LED colours to indicate different device statuses. It includes cloud update capability with automatic recovery from update failures and features accidental-press prevention to reduce false alarms. The unit has an IP54 rating for basic protection against dust and splashing water.

Suitable for

• Residential homes for personal emergency alerts
• Office environments for security or medical incidents
• Care homes and assisted-living facilities for resident assistance
• Small commercial premises requiring a discreet panic trigger

When it may not be suitable

This device is a simple manual panic button and does not replace multi-sensor detectors or full-featured alarm control units. It requires a compatible alarm panel that supports 868 MHz wireless devices; compatibility should be confirmed before purchase.

Key specifications

• Wireless frequency: 868 MHz
• Power source: battery-powered
• Communication: two-way RF
• LED indicators: multiple colours for status signalling
• Update method: cloud update with automatic recovery
• Protection rating: IP54
• Housing colour: white

How to use

Install the panic button in a convenient, accessible location and pair it with a compatible security panel according to the panel manufacturer’s pairing procedure. In an emergency, press the button to send the alarm signal; the LED indicators will show status and confirmation. Maintain the battery according to the manufacturer’s guidelines and ensure the device remains within the panel’s wireless range.

What to consider before purchase

• Confirm compatibility with your alarm panel and that it supports 868 MHz wireless devices
• Check battery type and expected battery life from the vendor or documentation
• Consider mounting location and wireless range in your premises
• Ensure IP54 protection level is sufficient for the intended environment

Recommendations

Place the unit where it is quickly reachable in emergencies, test pairing and alarm signalling after installation, and schedule periodic battery checks and firmware update verification to ensure reliable operation.