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Hikvision

· Alarm when ambient temperature exceeds 57℃ · 10 years battery life. Detection MethodTemperature Sensor, Environment Temperature IndicatorSupport, Signal Strength IndicatorSupport, Self-health CheckSupport, Alarm Sound InterlinkSupport, Power SwitchPower Up Enrolling, LED IndicatorRed (Alarm), Buzzer≥ 85dB @ 3 m, Transmission MethodTwo-Way RF Wireless, Transmission Frequency868MHz, Transmission SecurityAES-128 Encryption, Transmission Range(Free Space)1. 6Km, Enrolling MethodPower up;Remote ID;QR Code, Standard Battery Life10 years for standalone sensor5 years for RF wireless, Power SupplyBattery Powered, Battery TypeNon Replaceable Energizer L91 x 2 for SensorReplaceable CR123A x 1 for RF Wireless, Typical Voltage3V, Operation Temperature-10 °C to 50 °C (14 °F to 122 °F), Storage Temperature-20 °C to 60 °C (-4 °F to 140 °F), Operation Humidity5% to 90%, Dimension(WxHxD) 120 × 52. 5mm, Weight179. 5g, Mounting MethodCeiling, Application ScenarioIndoor,