Dahua ARD821-W2 Wireless Panic Button

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ARD821-W2(868)Wireless Panic Button Two-way RF communication Multi-color LED indicators for various statuses Supports cloud updates with automatic recovery on failure Designed to p revent accidental presses IP54-rated for dust and water resistance Functionality Indicator Light: 1 LED for multiple statuses (pairing, communication, etc.) Remote Update: Cloud update supported Button: 1 Signal Strength Detection: Yes Low Battery Detection: Yes Battery Level Display: Visible on mobile app Wireless Carrier Frequency: 868.0 MHz – 868.6 MHz Communication Distance: Up to 1,200 m (3,937.01 ft) in open space Communication Mechanism: Two-way Encryption: AES128 Frequency Hopping: Supported Technical Operating Current: 28 mA Test Mode: Yes General Operating Temperature: –10 °C to +55 °C (+14 °F to +131 °F) (indoor use) Operating Humidity: 10% – 90% RH Battery Type: CR2032 Battery Life: Approx. 3 years (based on twice weekly usage) Installation: Wall mount or portable Casing Material: PC + ABS Protection Rating: IP54 Dimensions & Weight Product Dimensions: 55 × 36 × 14.2 mm (2.17" × 1.42" × 0.56") Packaging Dimensions: 95 × 59.5 × 30.5 mm (3.74" × 2.34" × 1.20") Net Weight: 18 g (0.04 lb) Gross Weight: 48 g (0.11 lb) Certifications CE Certified EN 50131-1:2006 + A1:2009 + A2:2017 + A3:2020 EN 50131-3:2009 EN 50131-6:2017 EN 50131-5-3:2017 Security Grade: 2 Environmental Class: II Show more