Working voltage: 3 AAA batteriesQuiescent current: Less than 80uAAlarm current: Less than 30mAAlarm sound: light/sound promptSensors: electrochemical carbon monoxide sensor and infrared photoelectric sensorTemperature: 0C-50CRelative humidity: 10-95%Carbon monoxide sensor detection concentration: 000-999 Smoke sensor sensitive: 0.1%db/m-9.9%db/mAlarm indication: LCD display, light/sound promptBattery Capacity: Low Battery AlertColor: WhiteMaterial: ABSPackage Contents:1 x Carbon monoxide smoke composite alarm kitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.