The carbon monoxide detector alarm continuously monitors carbon monoxide levels to ensure the safety of your family. Powered by 2*1.5V AAA batteries (not included), easy to carry, easy to install, no socket required, not affected by power outages, and can be installed anywhere!Equipped with an advanced electrochemical carbon monoxide sensor, it can accurately detect the carbon monoxide level no matter where the detector is placed in the room. To ensure full protection, please make sure to place one on every floor and every bedroom in your home.Simple to use, just a test/reset button, when detecting that carbon monoxide reaches a dangerous level, the red LED will flash, and a loud alarm mode-85 decibels loud alarm with LED flash.Alarm standard: 50ppm, alarm within 60-90 minutes; 100ppm, alarm within 10-40 minutes; 300ppm, alarm within 3 minutes. Note: When you test the detector, please do not blow the hole directly with gas.Size: about 6x6x2.5cmmaterial: plasticcolor: WhitePackage Contents:1 * Carbon monoxide alarm2 * Screw1 * English manualOnly the contents of the above package, not including other products.Note: Light shooting and different monitors may cause the color of the objects in the picture to be slightly different from the actual object. The allowable measurement error is +/- 1-3cm.