4 Pack Combination Photoelectric Smoke Alarm and Carbon Monoxide Detector Battery Operated with Digital Display

2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning firesand instantly notifies you when dangerous smoke or Co concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats,all contained in 1 unit.

• 【Alarm and LED Indication】 Smoke and carbon monoxide detector has a real-time smoke and CO concentration on LCD display, once smoke or CO reaches its dangerous level, sensitive carbon monoxide alarm will give out both sound alert and red LED flash alarm, sound will be louder than 85 decibels.
• 【Easy to Install】The installation of fire alarm smoke detector is easy, it is easy to mount on any wall or ceiling, suitable for bedroom, kitchen, living room, basement, hotel, office, etc. Test button is for battery and alarm operation verification.
• 【Routine Maintenance Recommended】 It is advised to test the alarm weekly and to clean it regularly to prevent dust accumulation, which helps maintain proper function and sensitivity.
• 【Battery test】 Need to test the battery of the product every week to ensure the use of the product