【HIGH SENSITIVITY】The carbon monoxide detector uses a high-tech electrochemical sensor that can quickly detect dangerous levels of carbon monoxide and sound an alarm. Eliminate hidden dangers from the first use and protect the lives of you and your family. You can install it in your bedroom or living room. 【QUALITY CERTIFICATION】This carbon monoxide detector has been rigorously tested and certified to meet the European standard EN 50291. When a dangerous level of carbon monoxide is detected, the detector will emit an 85-decibel alarm and a red LED will flash to alert you. 【ALARM STANDARD】The alarm duration depends on the carbon monoxide concentration level. 50 ppm: alarm within 60-90 minutes; 100 ppm: alarm within 10-40 minutes; 300 ppm, alarm in 3 minutes. 【Compact and Lightweight】 This portable carbon monoxide detector, stylish and compact, can be placed anywhere in your home without any risk. It can be used at home or carried at any time while traveling, avoiding outdoor fires and