4 Packs Smoke and Carbon Monoxide Detectors, 2 in 1 CO & Smoke Fire Alarm for Home,Smoke Combination CO Alarm with LCD Display,Replaceable Battery Operated, Easy to Install

[2-in-1 Dual Sensors] Carbon monoxide detectors use dual optical and electrochemical sensors to detect smoke and carbon monoxide. It can quickly detect both fire smoke dangers and/or carbon monoxide gas leak in a single unit. Light spot sensor detects smoke, high sensitivity sensing carbon monoxide, to a great extent to avoid the occurrence of false alarms, provides the ultimate protection from 2 deadly threats.
[ LED Display&85dB Alarm] Smoke detector carbon monoxide detector combo has a large LCD screen, the concentration value of carbon monoxide in the air in real-time. once smoke or CO reaches its dangerous level, sensitive carbon monoxide alarm will give out both and red LED flash alarm, alarm clock with a sound greater than 85 decibels alerts you.
[360°Sensing&Decade-Long Protection]The vent carbon monoxide enters the induction chamber through the gap between the alarm shell and the bottom shell, and the 360° air intake ring ensures completely accurate detection without blind spots. Can be placed in any corner of the kitchen, bedroom, attic, etcand eliable sensors ensuring 10 years of stable performance. Your home security expert.
[Replaceable Battery&Easy Installation] Our portable Smoke Alarm and CO Detector comes with 3 high-capacity AA batteries, Ready to use upon receipt no additional purchase required and easy to replace. Measuring just 4.2 × 1.5 in (107 × 38 mm), our device boasts a thin and lightweight cordless design requires no rewiring ust install with the coming screw and plugs. It is recommended to install them on wall or ceiling.
[Quality Assurance&Package list] Smoke, carbon monoxide combination alarm in line with UL217, UL2034 standards. it is environmentally friendly and time-saving, and also has a long life. Package include 4 x carbon monoxide detector, 1 x holder, 2 x screws. 2 x expansion pipes. 12x AA batteries, 1 x user manual, If you have any questions or concerns, please feel free to contact us and we will give you satisfactory after-sales service within 24 hours.