DescriptionModel Number : PA005Brand Name : GauToneCertification : CEOrigin : Mainland ChinaType : Carbon Monoxide DetectorsWorking Voltage : 9V BatteryFeature : Real-time LCD Display FunctionAlarm Loudness : >85 dBSize : 126*126*35.5 mmFeature 1 : Co Carbon Monoxide DetectorFeature 2 : CO Detector Home SecurityFeature 3 : CO SensorFeature 4 : Carbon Monoxide Poisoning WarningNoticeDue to air traffic control, there is no battery inside the product.Product Features1. At 30ppm makes alarm within 120 minutes2. At 50ppm makes alarm within 60-90 minutes3. At 100ppm makes alarm within 10-40 minutes4. At 300ppm makes alarm within 3 minutesSensor: using an innovative imported electrochemical carbon monoxide sensorGauTone CO Detector Independent High Sensitive Carbon Monoxide Poisoning Alarm Alert Home Security Protection