Due to air traffic control, there is no battery inside the product.
1. At 30ppm makes alarm within 120 minutes
2. At 50ppm makes alarm within 60-90 minutes
3. At 100ppm makes alarm within 10-40 minutes
4. At 300ppm makes alarm within 3 minutes
Sensor: using an innovative imported electrochemical carbon monoxide sensor
GauTone CO Detector Independent High Sensitive Carbon Monoxide Poisoning Alarm Alert Home Security Protection