Features: 1.Powerful Detection Function: The CO alarm effectively monitors CO and coal smoke, providing timely alerts to protect the safety of your family. 2.High Definition LCD Display: The intuitive display shows the detection results, allowing users to easily understand the indoor air quality. 3.Reliable Alarm System: The loud alarm sound and bright flashing light warn household members of CO exceeding the safety levels. 4.Sensitivity Adjustment Function: The sensitivity of the CO alarm can be adjusted according to the actual environment, preventing false alarms. 5.Convenient and Easy to Use: With its compact design, the CO detector is easy to install and suitable for various application scenarios, including homes, kitchens, and gas rooms. Specification: Item Type: CO Alarm_x000D_ Material: ABS_x000D_ Battery Type: lithium battery, battery type: 1.5V AA x 3 (not included)_x000D_ Alarm Sound: Greater than 85dB_x000D_ Alarm Concentration:_x000D_ 50PPM 60-90 minutes alarm_x000D_ 100PPM 10-40 minutes alarm_x000D_ 300PPM 3 minutes alarm_x000D_ Electrochemical Sensor PackageList: 1 x CO Alarm 2 x Screw 2 xExpansion Screws 1 x English Manual