Professional carbon monoxide detector - imported electrochemical sensor, reliable reading, more responsive, avoid false readings and false positives LCD Digital Display - Monitor and display real-time readings to give you a quick idea of the status of your environment 80 decibel alarm: When the concentration of carbon monoxide reaches a certain level, the carbon monoxide alarm immediately emits an audible alarm > 80 decibels, allowing you to respond quickly Easy to install and versatile - the carbon monoxide alarm comes with mounting accessories, just stick 3M tape or drill holes in appropriate places to do so;For bedrooms, kitchens, living rooms and any other areas at risk of fire, it is possible to install smoke detectors and carbon monoxide alarms Warranty and Warranty - 1 year warranty, if you have any technical problems, please contact us, we will solve your problem as soon as possible.Power supply - 3*1.5v AAA battery (not included).Low power consumption, extremely long standby time