4-Pack, 2-in-1 Smoke and Carbon Monoxide Detector Combo with 10 Year Product Life, Battery Operated CO & Smoke Alarm Carbon Monoxide Detectors with LCD Display for Home, Easy to Install

2-in-1: This smoke detector and carbon monoxide detector utilizes a high-sensitivity photoelectric smoke sensor and a high-precision electrochemical CO sensor. The two sensors operate independently within a single unit, enabling separate detection of smoke concentration and CO concentration.
85 dB Alarm: When smoke or carbon monoxide is detected, the alarm will sound at over 85 decibels, with a red LED flashing. For enhanced reliability and accuracy, it's recommended to install multiple units throughout the home. Suitable locations include the living room, bedroom, hallway, garage, and basement.
Real-time LCD Display: The smoke detector carbon monoxide detector combo features a large LCD screen that provides real-time, clear, and intuitive display of CO concentration levels in the air, enabling effortless all-day precise monitoring.
Easy Installation: Powered by 9V battery, the smoke carbon monoxide detector is easy to install without additional wiring and can be easily mounted on walls or ceilings - screws and brackets are included.
10-Year Sensor Lifespan: The carbon monoxide and smoke detectors alarm sensor employs a 360-degree intake design for comprehensive air concentration monitoring. With a sensor lifespan of up to 10 years, it provides long-lasting protection for your home. Additionally, it meets UL217 and UL2034 standards, ensuring complete peace of mind and safety for your home and family over the course of a decade.

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