Specification
 1. Material: ABS plastic
 2. Power supply: 9V DC Block battery/PP3
 3. Quiescent current: 8μA
 4. Alarm current: 16mA
 5. Operating temperature: -10°C ~ +50°C
 6. Humidity: 0 to 95%(40±2°C),no condensing or icing
 7. Alarm decibel: Louder than 85dB at 10feet(3 meters)
 8. Test button: To verify the proper functioning of smoke alarm
 9. Low voltage warning: Smoke alarm beeps every 40 seconds for 30 days (minimum) to indicate a need of battery replacement
10. Smoke sensitivity: 0.086 dB/m to 0.140 dB/m