With this carbon monoxide detector, you can always detect the concentration of carbon monoxide to ensure the safety of you and your family. Features: The carbon monoxide detector with a digital display offers excellent security, making a loud alarm (85 dB) when it detects a buildup of carbon monoxide, alerts those in danger, ensures the safety of personal life. The CO alarm detector adopts a high-precision electrochemical sensor, high stability, and sensitivity, reduces false alarms. Low current consumption, long standby life, powered by 9V 6F22 battery (not included). The equipment has a low battery prompt and fault self-checking function. High-quality ABS materials, excellent corrosion, heat and impact resistance, good flame retardant effect. If there are any problems, please contact our store in time. We will give you a satisfactory solution. Thank you for your understanding. Specifications: Item name: Carbon monoxide detector Material: ABS Color: White Battery: 1*9V 800mAh