Carbon Monoxide Alarm Detector, HATHEPHS 10-Year Life Portable CO Alarm with Digital LCD Display, Battery Powered CO Detector with 3 LED Lights, 2-Pack

10 Years of Continuous Protection: Powered by a replaceable 9V battery and equipped with a 10-Year CO sensor, this CO alarm provides reliable protection for your house and circle of relatives for a decade.
Reliability & High Accuracy: Features an advanced electrochemical carbon monoxide sensor that appropriately detects carbon monoxide levels. Within the event of a potential threat, the detector will emit a loud 85-decibel alarm as an early warning.
Flexible Installation: This CO detector includes a free-standing design, allowing it to be placed on a tabletop or mounted on a wall with ease. Its portable design makes it easy to take with you whilst traveling.
Intuitive LED: The alarm features 3 LED indicators that provide clear details about its working status. A green LED indicates normal operation, a red LED indicates an alarm, and a yellow LED indicates a failure.
Easy-to-Read LCD: The high-definition LCD screen lets you easily monitor any changes in CO levels and battery status. To save power, the screen will only activate throughout testing or when the CO concentration reaches a certain level for a certain time period.