Smoke and Carbon Monoxide Detector Combo with Sound Warning and Number Display Battery Powered

As the only US Based Retailer of this item, We have a Chemist on Staff to answer any Technical Questions. We also Give e-books about Tips to Help Prevent Carbon Monoxide and How to Escape a Burning Building. This Combination CO/Smoke Carbon alarm features an 85dB/3m Horn and Voice that announces "Fire", "Carbon Monoxide", and "Low Battery" Warnings When Detected. Meets NFPA 72 standards / UL Standards Smoke and Carbon Monoxide Alarm, Detection Method Lonization, Electrochemical, Up to 24 Units Lnterconnection Capability, Audible Alert 85dB @ 10 ft., Horn, Visual Alert Red LED, Diameter 5-3/4 In., Height 1-3/4 In., Digital Readout Yes, Battery Backup Yes, Features Voice Warning, Peak Level Memory, Reset Button, Hush Button Yes, Locking Pin Yes, Operating Temp. 40 Degrees to 100 Degrees F, Includes Mounting Anchors and Screws Features: * Battery low Voltage tips *Test & Reset Button * Lnfrared Photoelectric Sensor *3 Color lights for Different alarm State * Sound and Light alarm / LED indication alarm * SMT industry, Strong Stability MCU automatic Processing Technology to improve Product Stability Technical Parameters Working Power: 3V Battery (Three AA 1.5V) ? Package not include? Quiescent Current: <8uA Alarm Current: <35mA Sensitivity: 2.06% / ft ± 1.3 Alarm indication: red LED flashes Alarm sound pressure: ? 85dB / 3m Department Operating temperature: -10 ? ~ +50 ? Relative Humidity:10%-95%RH Dimensions: ?104x39mm Executive Standard: GB4715-005; En14604 Alarm indicationCO: Red light flash and Buzzer Smoke: Bule light Flash and Buzzer Coverage Area: When the Space Height is 6m-12m, the Protective area of one Detector is 80m2 for the General Protection Site and 60m2 for the Space Height of 6m or Less.