Gas Detector, Combined Carbon Monoxide Smoke Detector, Battery-Operated CO Smoke Detector with LED Display, Flashing Alarm, and White Warning Sound Pattern

Features: [Combined CO and Smoke Detector] With an advanced electrochemical carbon monoxide sensor and a photoelectric sensor, CO and smoke detection is accurate. [Pattern Warning; Flashing and Loud Alarm] When a dangerous concentration of smoke or CO is detected, it will warn you with flashing LEDs and a loud alarm. [LED Display] Clearly shows the real-time carbon monoxide concentration in the surrounding air. [Battery Powered] Powered by 2 * AAA batteries (not included), no need to charge, no messy wires, convenient to use. [Easy to Install] Comes with a bag of screws, easy to install the detector on the walls of the bedroom, living room, kitchen, etc.