Photoelectric type smoke detector 9V battery-operated Low battery alert With LED indicator

1. Smoke Sensitivity: 0.086 dB/m to 0.14 dB/m    2. Power Supply: 9V Carbon Zinc/Alkaline/Lithium Batttery 3. Battery Life: >12months    4. Low battery life: >30days    5. Alarm indicator: continuously emitting red light and shounder          6. Alarm sound level: >85dB at 10 feet (3m)    7. Temperature: 0°C - 50°C    8. Humidity: 10%-90%RH, no condensation or icing9. Dimensions (L x W x H):  Ø125x35 mm

designer smoke alarm