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Dahua · Alarms

Dahua DHI-ARA12-W2 Alarm Wireless Indoor Siren

Model / SKU: DHI-ARA12-W2

Dahua DHI-ARA12-W2 Alarm Wireless Indoor Siren. The Dahua DHI-ARA12-W2 Alarm Wireless Indoor Siren is a compact and efficient device designed to enhance home security. It operates on two-way communication technology, ensuring reliable signal transmission, and uses frequency hopping to avoid interference. With a loud sound pressure of over 84 dB, it effectively deters intrusions. The device also features tamper alarms and a low battery warning to ensure continued operation. It is powered by two CR123A batteries with a lifespan of 2.5 years under normal conditions. This siren supports cloud updates, making maintenance easier, and has a wide communication range of up to 1,000 meters in open space. Its small dimensions and lightweight design make it suitable for installation in homes, villas, or apartments, and it can be mounted using a bracket. Additionally, it includes temperature measurement capabilities, working within a range of -10°C to +55°C, adding another layer of monitoring. The unit is certified for security and environmental standards, offering both functionality and reliability in various environment. Key Features Signal strength detection Low battery alarm Temperature monitoring Frequency hopping function and two-way communication technology ensure communication stability Cloud update and automatic recovery from update failure DHI-ARA12-W2 Datasheet The Dahua DHI-ARA12-W2 Wireless Indoor Siren is a security device designed for use in various settings, such as homes, apartments, and commercial establishments. It features a loud alarm with a sound pressure level of ≥84 dB to deter intruders. Powered by two CR123A batteries, it offers a battery life of up to 2.5 years. The device uses two-way communication technology and AES128 encryption, ensuring secure and reliable operation over a range of up to 1,000 meters. Additionally, the siren includes tamper detection, low battery alarms, and temperature monitoring. It supports cloud updates for easy maintenance and is compatible with the DMSS app, allowing users to manage the siren remotely. The compact design (81 mm x 81 mm x 26 mm) and simple bracket mount make installation straightforward. Dimension Application Technical Specifications Port Indicator Light 1 × green alarm indicator Button 1 × power button Function Tamper Alarm Yes Remote Upgrade Cloud update Test Mode Yes Low Battery Alarm Yes Search Signal strength detection Wireless Carrier Frequency 868.0 MHz–868.6 MHz Transmitter Power (EIRP) Limit 25 mW Communication Distance Up to 1,000 m (3,280.84 ft) in an open space Communication Mechanism Two-way Frequency Hopping Yes Encryption Mode AES128 General Power Supply 2 × CR123A batteries Power Consumption Max. 240 mW Operating Temperature –10 °C to +55 °C (+14 °F to +131 °F) (indoor) Operating Humidity 10%–90% (RH). Product Dimensions 81.0 mm × 81.0 mm × 26.0 mm (3.19″ × 3.19″ × 1.02″) (L × W × H) Packaging Dimensions 135.0 mm × 98.5 mm × 56.8 mm (5.31″ × 3.88″ × 2.24″) (L × W × H) Installation Bracket mount Net Weight 105 g (0.23 lb) Gross Weight 175 g (0.39 lb) Certifications CE EN 50131-1:2006+A1:2009+A2:2017+A3:2020 EN 50131-4:2019 EN 50131-6:2017 EN 50131-5-3:2017 Security Grade 2 Environmental Class II Battery Life 2.5 years in working status (triggered twice every week and alerts 120 s for each triggering) Sound Pressure Volume high 84 db (A )1 m Volume medium 78 db (A)1 m Casing PC + ABS Temperature Measuring Range –15 °C to +65 °C (+18.8 °F to +149 °F) (indoor) Measuring Precision ± 1 °C (± 33.8 °F) Resolution 1 °C (33.8 °F) Audio/Video Parameter Volume Adjustment 3 volumn levels