1. Loud 85db alarm 2. Permanent carbon monoxide sensor 3. The red LED will flash in alarm mode. 4. Standby: Green LED flashes once every 30 seconds 5. Low Battery Indicator: Beeps every 30 seconds when the battery is less than 3.3V with the green LED flashing and Lb on the LCD screen. 6. 3-digit LCD display 7. Power supply: 3 AA batteries (not included) 8. Sensitivity and time: 50 ppm, alarms within 60-90 minutes; 100 ppm, alarms within 10-40 minutes; 3000 ppm, alarms within 3 minutes 9. Standby current: <50uA 10. Alarm current: <50 mA
