Welcome to our store！</br>1、This alarm detects carbon monoxide through the air intake. 2、When the concentration reaches a certain value, a 90 decibel alarm sound and warning light will be issued (the interval is different for different concentrations). 3、LCD display real-time display density (less than 30PPM will not display). 4、Powered by 2 AAA batteries (not included), low power consumption, can last for about 1 year. 5、Easy to install, effectively protect the health of you and your family. <div class="wang-edit-text"><div>Condition: 100% Brand New Item Type: CO Sensor Color: Shown as Picture Material: ABS Detection Angle: 360 ° Detection Distance: 15m Installation Method: Wall-Mounted Scope Of Use: Bedroom, Living Room, Bathroom, Kitchen Power Supply: 2 x AAA Batteries (not Included) Alarm Mode: Sound + LED Indicator Alarm Volume: 90 ± 5db</div><style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style></div> <div>1 x Carbon Monoxide Alarm</div><div>1 x Screw Bag</div><div>1 x Instructions</div> Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>