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