Dahua Wireless Siren

ARA12-W2(868) Wireless siren > Signal strength detection. > Low battery alarm. > Temperature measurement. > Frequency hopping function and two-way communication technology > Cloud update and automatic recovery from update failure. Specifications Accessories Download Product Selector 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 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 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 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 <p data-gtm-vis-has-fired-10552706_181="1" data-gtm-vis-has-fired-10552706_195="1" data-gtm-vis-first-on-screen-10552706_194="17083" data-gtm-vis-first-on-screen-10552706_196="17084" data-gtm-vis-first-on-screen-10552706_217="17086" data-gtm-vis-first-on-screen-10552706_184="17087" data-gtm-vis-first-on-screen-10552706_192="17088" data-gtm-vis-first-on-screen-10552706_193="17089" data-gtm-vis-recent-on-screen-10552706_194="141928" data-gtm-vis-total-visible-time-10552706_194="100" data-gtm-vis-has-fired-10552706_194="1" data-gtm-vis-recent-on-screen-10552706_196="141934" data-gtm-vis-total-visible-time-10552706_196="100" data-gtm-vis-has-fired-10552706_196="1" data-gtm-vis-recent-on-screen-10552706_217="141939" data-gtm-vis-total-visible-time-10552706_217="100" data-gtm-vis-has-fired-10552706_217="1" data-gtm-vis-recent-on-screen-10552706_184="141942" data-gtm-vis-total-visible-time-10552706_184="100" data-gtm-vis-has-fired-10552706_184="1" data-gtm-vis-recent-on-screen-10552706_192="141945" data-gtm-vis-total-visible-time-10552706_192="100" data-gtm-vis-has-fired-10552706_192="1" data-g