Dahua ARD821-W2 Wireless Panic Button, 433 MHz Two-Way RF, IP54
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ARD821-W2
Wireless Panic Button
> Provides multiple LED colors to indicate different statuses.
> Cloud update and automatic recovery from update failure.
> Offers accidental press prevention.
> Battery life up to 5 years if used twice a week.
> IP54 rated.
Product Data
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Function |
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Indicator Light |
1 for multiple statuses (pairing, communication, and more) |
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Remote Update |
Cloud update |
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Button |
1 |
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Signal Strength |
Yes |
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Low Battery Detection |
Yes |
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Battery Level Display |
Displays battery level on app |
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Wireless |
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Carrier Frequency |
433.1 MHz–434.6 MHz |
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Communication Distance |
Up to 1,300 m (4,265.09 ft) in an open space |
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Communication Mechanism |
Two–way |
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Encryption Mode |
AES128 |
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Frequency Hopping |
Yes |
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General |
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Operating Temperature |
–10 °C to +55 °C (+14 °F to +131 °F) (indoor) |
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Operating Humidity |
10%–90% (RH) |
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Battery Model |
CR2032 |
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Battery Life |
3 years (if used twice a week) |
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Product Dimensions |
55 mm × 36 mm × 14.2 mm (2.17" × 1.42" × 0.56") (L × W × H) |
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Packaging Dimensions |
95 mm × 59.5 mm × 30.5 mm (3.74" × 2.34" × 1.20") (L × W × H) |
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Installation |
Wall mount; portable |
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Net Weight |
18 g (0.04 lb) |
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Gross Weight |
48 g (0.11 lb) |
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Certifications |
CE |
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Casing Material |
PC + ABS |
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Protection |
IP54 |
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Technical |
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Operating Current |
28 mA |
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Test Mode |
Yes |
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Order & Pricing Information for Surveillance Products
Please note the following important details when ordering surveillance products from ICCTVZONE:
- Order confirmation: After you place an order, please check the confirmation email from our team. We will confirm stock, lead time and shipping before dispatch.
- Stock & replacements: Inventory status is not real-time. If an item is out of stock, we may propose a compatible replacement model for your approval.
- Final pricing: Prices shown are indicative. The final price is confirmed on the Proforma Invoice (PI) after order confirmation.
- Project-specific pricing: Some products are configured for project requirements; pricing may vary with quantity and specification.
- Minimum order: A minimum order value may apply to non-stock or project items; our team will confirm before processing.
- Shipping costs: Shipping is calculated separately and added to the order total.
- Duties & taxes: Import duties, taxes and customs clearance fees are not included in the product price or shipping quote. These charges are the customer's responsibility.
- Genuine products: We supply genuine products from leading brands with current firmware.
- Technical support: Our engineers provide pre-sales and after-sales technical support.
- Warranty: Warranty terms depend on the product and order type; we will confirm the applicable coverage in writing.
Questions? Contact sales@icctvzone.com.
Product Features
What this model is for, what it does well, and what to confirm before it goes on a project.
Indoor alarm systems that need a wall-mounted or portable panic button with two-way RF communication and accidental-press prevention.
Two-way RF communication with AES128 encryption and frequency hopping helps keep the button's signal exchange with its paired receiver consistent.
Accidental press prevention reduces false triggers, so everyday handling is less likely to raise an unintended alarm.
A CR2032 battery supports up to 3 years of use at twice a week, with low battery detection and app battery level display.
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