DHI Panic Key ARD821(With bracket)
DHI Panic Key ARD821(With bracket)
The ARD821-W2(868) is a wireless panic button from Dahua, designed to complement alarm systems built around Dahua's wireless hubs. With a single press, the user can quickly trigger an emergency or panic alarm in an acute situation, such as during a burglary, assault, or other emergency.
The button is designed with protection against accidental activation, reducing the risk of false alarms during everyday handling. It can be mounted on a wall or carried as a portable device, providing flexibility depending on where in the home or business the protection is most needed. Thanks to two-way communication and frequency hopping, the button communicates stably and interference-free with the hub, with a range of up to 1,200 meters in open areas.
The device is powered by a CR2032 battery with a battery life of up to 3 years (when used twice a week), and automatically warns of low battery levels, with the battery level visible directly in the app. With IP54 protection class, the button can withstand some exposure to dust and water splashes. With EN 50131 Grade 2 certification, the ARD821-W2(868) is well-suited for both private homes and professional alarm installations.
Key Features
- Protection against accidental activation
- Can be mounted on a wall or carried as a portable device
- Battery level displayed directly in the app
- Frequency hopping and two-way communication for stable wireless connection
- Cloud update
- Test mode for easy installation check
- IP54 protection class
- Low battery warning
Technical Specifications
| Feature | Value |
|---|---|
| Indicator light | 1 x indicator for multiple statuses (pairing, communication, etc.) |
| Button | 1 pc |
| Remote update | Cloud update |
| Search | Signal strength identification |
| Low battery warning | Yes |
| Battery level display | Displayed in app |
| Carrier frequency | 868.0–868.6 MHz |
| Range | Up to 1,200 m in open area |
| Communication | Two-way |
| Encryption | AES128 |
| Frequency hopping | Yes |
| Operating temperature | –10 °C to +55 °C (indoor) |
| Operating humidity | 10–90 % RH |
| Battery model | CR2032 |
| Battery life | 3 years (when used 2 times/week) |
| Dimensions (L x W x H) | 55 × 36 × 14.2 mm |
| Package dimensions | 95 × 59.5 × 30.5 mm |
| Installation | Wall mount or portable |
| Net weight | 18 g |
| Gross weight | 48 g |
| Housing material | PC + ABS |
| Protection class | IP54 |
| Certifications | CE, EN 50131-1:2006+A1:2009+A2:2017+A3:2020, EN 50131-3:2009, EN 50131-6:2017, EN 50131-5-3:2017, Security Class Grade 2, Environmental Class II |
| Operating current | 28 mA |
| Test mode | Yes |