The Dahua DHI‑ARD821‑W2 Wireless Panic Button features two‑way RF communication, accidental press prevention, IP54 rating, cloud updates, and long battery life — perfect for emergency alerts in homes, offices, and retail environments.

Product Description

The Dahua DHI‑ARD821‑W2 Wireless Panic Button is a compact and dependable emergency alert solution that delivers rapid, reliable two‑way communication in critical situations. Whether used to trigger alarms for intrusion, fire, gas leaks, or medical emergencies, this device ensures fast notifications to both the monitoring center and designated contacts. Built with an IP54-rated casing and offering accidental press prevention, it is suitable for residential and commercial spaces alike. Integration with Dahua alarm systems enhances responsiveness and remote management.

What’s Included in the Box

• 1 × Dahua DHI‑ARD821‑W2 Wireless Panic Button

• Installation Accessories (varies by model: standard, strap, or bracket version)

• User Guide

Main Features

• Two-Way RF Communication: Ensures real-time signal confirmation between the panic button and the alarm hub.

• Multiple LED Indicators: Displays pairing, signal strength, communication status, and low battery alerts.

• Cloud-Based Updates: Enables remote firmware updates with automatic recovery from failed updates.

• Accidental Press Prevention: Reduces false alarms for improved reliability.

• IP54 Protection: Resistant to dust and water splashes, ideal for indoor use in varied environments.

• Flexible Installation: Wall-mounted or portable options (including versions with bracket or straps).

• App Integration: Battery level and device status viewable on the mobile app.

Detailed Specifications

Communication & Wireless

• Frequency: 433.1 MHz – 434.6 MHz

• Distance (Open Space): Up to 800 m

• Communication: Two‑way with AES128 encryption and frequency hopping

• Signal Strength Indicator: Yes

• Test Mode: Yes

Power & Battery

• Battery Type: CR2032

• Battery Life: Up to 3 years (with use twice per week)

• Operating Current: 28 mA

• Low Battery Detection: Yes

• Battery Level Display: Via mobile app

General

• Operating Temp: –10 °C to +55 °C

• Humidity: 10% – 90% RH

• Protection Rating: IP54

• Casing Material: PC + ABS

• Certifications: CE

• Installation: Wall mount or portable

• Dimensions: 55 × 36 × 14.2 mm

• Net Weight: 18 g

• Gross Weight: 48 g

• Packaging Dimensions: 95 × 59.5 × 30.5 mm

Warranty Information

• Manufacturer’s standard warranty

• Warranty support available through authorized Dahua representatives in Australia and New Zealand

Brand Overview

Dahua Technology is a globally recognized provider of smart security solutions, offering a wide range of surveillance and alarm products trusted by professionals and homeowners worldwide for their reliability and innovation.

SKU

DHI‑ARD821‑W2

Practical Use Scenarios

✔ Residential Homes: Elderly or vulnerable individuals can signal emergencies such as falls or health concerns.
✔ Offices & Commercial Spaces: Silent alarms for intrusion or hold-up events.
✔ Retail Stores: Staff-triggered panic alert for security incidents or emergencies.
✔ Apartments & Villas: Integrates with home alarm systems for gas, fire, and intrusion alerts.

Datasheets & Resources

• Official Product Datasheet

Excellence for the Australian and New Zealand Market

The Dahua DHI‑ARD821‑W2 Wireless Panic Button is RCM certified and tailored to meet the rigorous safety standards of Australia and New Zealand. Designed for reliable performance in local conditions, it is sourced through authorized Dahua partners, ensuring dependable after‑sales support and warranty coverage. Firmware updates and product servicing are handled directly through regional support channels, giving installers and users confidence in long‑term reliability.

FAQs

1. What is the Dahua DHI‑ARD821‑W2 Wireless Panic Button used for? (Product Code: DHI‑ARD821‑W2)
The DHI‑ARD821‑W2 is designed to trigger immediate alerts for intrusions, fire, gas leaks, or medical emergencies, sending notifications to monitoring centers and linked mobile devices.

2. How far can the DHI‑ARD821‑W2 communicate with the alarm hub? (Product Code: DHI‑ARD821‑W2)
It supports a wireless communication distance of up to 800 m in open space.

3. Does the Dahua DHI‑ARD821‑W2 support remote updates? (Product Code: DHI‑ARD821‑W2)
Yes. The device supports cloud-based firmware updates with automatic recovery in case of failure.

4. Is the DHI‑ARD821‑W2 water-resistant? (Product Code: DHI‑ARD821‑W2)
Yes. It has an IP54 rating, making it resistant to dust and water splashes—ideal for indoor environments.

5. How long does the battery last in the DHI‑ARD821‑W2 panic button? (Product Code: DHI‑ARD821‑W2)
The CR2032 battery offers a life of up to 3 years with standard use (twice per week).