DAHUA SIREN WRL INDOOR/868MHZ ARA12-W2

— Signal strength detection.
— Low battery alarm.
— Temperature measurement.
— Frequency hopping function and two-way communication technology
— Cloud update and automatic recovery from update failure.
— Carrier Frequency: 868.0 MHz–868.6 MHz
— Communication Distance: Up to 1,000 m in an open space, two-way
— Encryption Mode: AES128
— Power Supply: 2 × CR123A batteries
— Operating Temperature: –10 °C to +55 °C, indoor only
— Battery Life: 2.5 years in working status (triggered twice every week and alerts 120 s for each triggering)
— Sound Pressure: ≥ 105 ± 3 dB\1M
— Temperature Measuring Range: –15 °C to +65 °C
— Product Dimensions: 81.0 mm × 81.0 mm × 26.0 mm