Feature:1. Smoke and carbon monoxide detector offers excellent security, making a loud alarm when it detects a buildup of smoke or carbon monoxide, and instantly alert those in danger, ensure the safety of personal life.2. Built-in electrochemical sensor with high accuracy and infrared photoelectric sensor, high stability and sensitivity, reduces false alarms. Alarm memory function, produce memory after last test, more sensitive next time.3. Low current consumption, long standby life, powered by 3 AA batteries (not included), low battery prompt. Alarm concentration: 50PPM.6090 minutes; 100 PPM.1040 minutes; 300 PPM. 3 minutes.4. Combined Carbon Monoxide and Smoke Alarm, a single alarm can be installed where previously two were needed. Reduce installation time and help to keep home decoration attractive.5. Hush mode features temporarily silences nuisance alarms. If the alarm had detected a CO level of 100ppm or higher, the unit will alarm to warn of the CO incident when the Test/ Reset button is pressed.Specification:With this smoke/carbon monoxide detector, you can always detect the concentration of smoke/carbon monoxide to ensure the safety of you and your family.Features:Smoke and carbon monoxide detector offer excellent security, making a loud alarm when it detects a buildup of smoke or carbon monoxide, and instantly alert those in danger, ensure the safety of personal life.Built-in electrochemical sensor with high accuracy and infrared photoelectric sensor, high stability, and sensitivity, reduces false alarms. Alarm memory function, produce memory after the last test, more sensitive next time.Low current consumption, long standby life, powered by 3 AA batteries (not included), low battery prompt.Alarm concentration: 50PPM.6090 minutes; 100 PPM.1040 minutes; 300 PPM. 3 minutes.Combined Carbon Monoxide and Smoke Alarm, a single alarm can be installed where previously two were needed. Reduce installation time and help to keep home decoration attractive.Hush mode features temporarily silences nuisance alarms. If the alarm had detected a CO level of 100ppm or higher, the unit will alarm to warn of the CO incident when the Test/ Reset button is pressed.Specifications:Item name: Smoke/Carbon Monoxide AlarmMaterial: ABSColor: WhiteStatic current: <80uAAlarm current: <30mAWorking temperature: 0-50Working humidity: relative humidity 10%-95%Carbon monoxide detection concentration: 000999 PPMSmoke sensitivity: 0.1% db/m-9.9% db/m Alarm indicator: LCD display, sound and light promptElectric quantity display: low battery alarmBattery: 3*AA(not including)Product size: 10.5*4cmNote:*There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding.Package information:Package weight: 180gPackage size: 11.5*11.5*4.5cmPackage list:1*Alarm1*Screw kit1*ManualPackage List:1*Alarm1*Screw kit1*Manual