With this carbon monoxide detector, you can always detect the concentration of carbon monoxide to ensure the safety of you and your family. Features: Carbon monoxide detector offer excellent security, making a loud alarm (85 dB) when it detects a buildup of carbon monoxide, and instantly alert those in danger, ensure the safety of personal life. Built-in high accuracy sensor, high stability, and sensitivity, reduces false alarms. Low current consumption, long standby life, powered by 3 AA batteries (not included), low battery prompt. Alarm concentration: 50PPM.6090 minutes; 100 PPM.1040 minutes; 300 PPM. 3 minutes. High quality PC and ABS materials, excellent corrosion, heat and impact resistance, good flame retardant effect. Specifications: Item name: Carbon Monoxide Alarm Material: ABS Color: White Static current: <80uA Alarm current: <80mA Working temperature: 4-38 Alarm sound: 85dB (3 meters) Rated voltage: 220V 50HZ Electric quantity display: low battery alarm Battery: 3*AA(not including) Product size: 10*3.8cm Note: *There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Package information: Package weight: 106g Package size: 10.5*10.5*4cm Package list: 1*Alarm 1*Screw kit 1*Manual