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With this carbon monoxide detector, you can always detect the concentration of carbon monoxide to ensure the safety of you and your family. Features: Smoke and carbon monoxide detector offers excellent security, making a loud alarm when it detects a build-up of smoke or carbon monoxide, and instantly alert those in danger, ensure the safety of personal life. 1-click self-check function: Press the full check button, the alarm will send an alarm sound, and the red indicator light will flash, indicating the normal working state. When the host detects a carbon monoxide leak, the LCD screen displays the current value based on the gas concentration.(000-999PPM) With an imported sensor, it can respond to an alarm in 2 seconds after the detection of carbon monoxide reaching 150ppm, with 85dB and LED red light flashing. Low current consumption, long standby life, powered by 2 AA batteries (not included). Easy to install. Specification: Item name: Carbon Monoxide Alarm Color: White Material: Plastic Sensitivity: 150ppm Alarm sound: ≥85dB (1 m straight ahead) Rated voltage: DC3V Static current: ≤60uA Alarm current: ≤45mA Working temperature: 0-50°C Working humidity: ≤95% Carbon monoxide detection concentration: 000~999 PPM Alarm indicator: LCD Screen, sound and light prompt Power: 2 x AA battery (not included) Size: 105 x 40 mm Package information: Size: 12 x 5 x 11.5 cm Weight: 160g Package List: 1 x Carbon Monoxide alarm 2 x Expansion pipe 1 x bracket 2 x Screw 1 x User manual