Carbon Monoxide Detector,CO Gas Monitor Alarm Detector Replaceable Battery with Digital LCD Display and Sound Warning for Home/Kitchen/Bedroom Kandi Each pen has a diamond

Each pen has a diamond shaped ink level window

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(Note: When installing

Rich red color

Carbon Monoxide Detector,CO Gas Monitor Alarm Detector Replaceable Battery with Digital LCD Display and Sound Warning for Home/Kitchen/Bedroom Kandi Each pen has a diamondBrand: USBNOVEL Features: High Sensitivity and Rapid Response: Equipped with an advanced Carbon Monoxide Detector Chip and electrochemical sensor, our CO Gas Monitor Alarm quickly detects odorless, invisible, and deadly carbon monoxide in the air. Respond quickly to protect your life. Easy Installation: Our carbon monoxide detector provides continuous monitoring of CO levels, ensuring the safety of your family. No need for wiring, just insert 2 AA