The DHI-ARA24-W2 is a compact wireless keyfob designed for quick and secure arming, disarming, and emergency alerts in Dahua alarm systems. With four intuitive buttons and reliable two-way communication, it’s ideal for residential and small business users who want fast access to their alarm system from anywhere in the home or premises. The device supports cloud updates and features strong wireless encryption for safe and stable operation.
Key Features
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4 Control Buttons (Home, Away, Disarm, SOS) - Effortlessly switch between security modes or trigger emergency alerts with a simple button press.
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Built-In SOS Emergency Alarm - Instantly alert your system in a panic or emergency situation from anywhere within range.
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Two-Way Communication - Receive visual feedback confirming your command was received — more reliable than one-way remotes.
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Secure Wireless Transmission - AES128 encryption and frequency hopping prevent signal interference or hacking attempts.
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Up to 500m Communication Range - Covers large homes and multi-room offices with stable signal in open environments.
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Cloud Firmware Updates - Supports OTA firmware upgrades with automatic recovery if the update fails.
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Battery-Powered with Long Life - Runs on a single CR2032 battery for up to 3 years of operation.
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Compact and Lightweight - Sleek, ergonomic design fits easily into your pocket or keychain.
Perfect For:
- Villas and private homes
- Apartments and condominiums
- Small retail shops
- Elderly family members needing quick SOS access
- Bedside or entryway remote control
- Staff security control in small offices
Install Tips
- Pair the keyfob through DMSS or COS Pro apps for easy configuration.
- Test signal strength in key areas to ensure coverage meets user needs.
- Assign the keyfob to individual users for tracking or access control.
- Encourage placement near bedsides, doorways, or desks for rapid emergency access.
- Always check battery level via app and replace proactively around the 2.5-year mark.
- Avoid mounting or storing the device near metal surfaces that may reduce signal range.
Downloads
Quick-Read Specs Card
| Specification |
Details |
| Control Buttons |
4 (Home, Away, Disarm, SOS) |
| Wireless Range |
Up to 500m (open space) |
| Encryption |
AES128 + Frequency Hopping |
| Power |
CR2032 Battery (Up to 3 Years) |
| Feedback |
Two-color LED Indicator (Green/Red) |
| Cloud Updates |
Yes, with auto recovery |
| Operating Temp |
–10°C to +55°C |
| Communication |
Two-way wireless |
| Dimensions |
60 × 39.5 × 15 mm |
| Weight |
20 g (Net), 65 g (Gross) |
Extra Info
Effortless Multi-Mode Control
With four clearly labeled buttons, the ARA24-W2 simplifies everyday alarm system use. Switch between "Home" and "Away" modes, disarm the system when returning, or press SOS during emergencies — all without opening an app.
Reliable Panic Response
In urgent situations, pressing the SOS button immediately sends a distress signal to your system. This feature is especially useful for elderly users, lone workers, or high-risk scenarios.
Secure Wireless Design
AES128 encryption and frequency hopping tech make it extremely hard to jam or spoof the signal, ensuring your keyfob commands reach the base station securely.
Cloud-Friendly Maintenance
Like other modern Dahua devices, it supports cloud firmware updates — ensuring it stays functional, secure, and up-to-date without manual intervention.
Q&A
Q: How accurate is the temperature sensor?
A: It provides indoor temperature readings with ±1 °C accuracy.
Q: What does each button do?
A: The keyfob includes Home, Away, Disarm, and SOS buttons — each tailored for quick control of your alarm modes or emergencies.
Q: Is this compatible with all Dahua alarm systems?
A: Yes, it's designed for use with Dahua’s wireless alarm ecosystem and easily pairs via DMSS or COS Pro apps.
Q: How far can I be from the alarm hub for it to work?
A: Up to 500 meters in open space. Walls and metal structures may reduce this range slightly.
Q: Does the keyfob give feedback after pressing a button?
A: Yes, a two-color LED shows green for success and red for issues or out-of-range signals.
Q: Can it be updated remotely?
A: Yes, it supports cloud firmware updates and auto-recovers if an update fails.
Q: What happens if the battery runs low?
A: A low battery alert will be sent through the app, so you’ll know in advance.
Q: Is this waterproof or outdoor-rated?
A: No, it’s intended for indoor use only or for safe-carry in dry conditions.
Q: How long does the battery last?
A: Up to 3 years with typical use, powered by a single CR2032 battery.
