Smoke and Carbon Monoxide Combo Alarm

Smoke and Carbon Monoxide Combo Alarm (smoke alarm, CO alarm) 1. One alarm protects against two deadly household threats simultaneously Smoke Sensor: PhotoelectricCO Sensor: Electrochemical2. High and stable smoke sensitivity3. CO concentration threshold: varying time-to-alarm depending on concentration4. Separate smoke & CO warnings5. Fitting and battery tamper-resist feature6. With quick fix mounting bracket for easy installation7. Insects Proof8. LED operation indicator9.Low-battery warning indicator10.Self-test/Hush button 11.Auto-reset when smoke clears and CO is under its peak level12. CE, TUV certifications OperationTemperature4°C -38°CPower Source9 volt BatterySensitivity to Smoke3.0-6.0 %Obs /mResponse TimesAt 50 ppm, unit must alarm within 60 90 minAt 100 ppm, unit must alarm within 10 40 minAt 300 ppm, unit must alarm within 3 min Alarm Current30mA maxStandby Current20uA maxAlarm Sound Level85 decibels at 3 meters