Feature: 1. Digital LCD Display: This CO detector is equipped with digital LCD screen to display the concentration of CO, which is clear and intuitive, helping you understand the situation of gas leakage. 2. High Volume Alarm: This CO detector supports high volume audible and visual alarm, with an 85dB speaker level, providing accurate and reliable alarm to prevent disasters from occurring. 3. Good Performance: Independent temperature sensitive fire detector, has 360 degree wide range detection, high sensitivity, stable performance, low power consumption, and long service life. 4. Audible Visual Alarm: When the temperature reaches the alarm value, the smoke detector indicator light starts to flash. After confirmation, the red indicator light lights up with an alarm sound. 5. Wide Alarm Range: This smoke detector has a high decibel alarm prompt, emitting an 80 decibel alarm sound within a range of 3 meters to promptly remind you and your family to protect them. Specification: Item Type: Smoke and CO Detector Material: ABS CO Detector Battery: 3 x AAA Batteries (not included) Smoke Detector Battery: 1 x 280mAh 9V 6F22 Battery (built in) CO Detector Parameter: Sensor Type: Electrochemical Detection Gas Type: CO Detection Range: 000-999ppm Sensitivity and Time: 50ppm alarm 60-90 minutes, 100ppm alarm 10-40 minutes, 300ppm alarm within 3 minutes Standby Current: