Feature:1. High Sensitivity Sensor: The CO leakage alarm is equipped with a highly sensitive sensor that can quickly detect even low concentrations of CO gas.2. Intuitive Display: The LCD screen provides an easy to understand concentration display, allowing you to easily understand the CO concentration levels.3. Automatic Alarm Function: When high concentrations of CO are detected, the CO detector triggers a sound and light warning alarm to ensure user safety.4. High Reliability and Safety: The CO Alarm offers a high level of reliability and ensures quality and safety,designed in a small and compact size, making it space saving.5. 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 AlarmMaterial: ABSBattery Type: Lithium Battery, Battery Type: 1.5VAAA x 2 (not included)Alarm Sound: Greater Than 85dBAlarm Concentration: 50PPM 60-90 Minutes Alarm100PPM 10-40 Minutes Alarm300PPM 3 Minutes AlarmElectrochemical Sensor.Package List:1 xCO Alarm2 x Screw2 x Expansion Screw1 x English Manual