Carbon Monoxide Smoke Composite Alarm Detector 1. Product size: 96x96x41mm 2. Battery powered: 3x1.5VAA batteries 3. Quiescent current: less than 10uA 4. Alarm current: less than 50mA 5. Alarm sound: sound and light prompt 6. Sensors: ectrochemical carbon monoxide sensor and infrared photoectric sensor 7. Working temperature: 0-50 degrees Csius 8. Working humidity: rative humidity 10%-95% 9. Carbon monoxide gas detection concentration: 000~999PPM 10. Smoke: 0.1% db/m-9.9% db/m 11. Alarm indication: LCD display, sound and light prompt 12. Battery display: low battery alarm 13. Real-time monitoring LCD display accurate concentration 14. Built-in dual dual sensors can detect carbon monoxide, smoke and other gases 15. This product can be installed by paste, which is more convenient and worry- to use. Note: This product does not come with a battery