Our carbon monoxide detection alarms are UL 2034 tested. UL Testing Institute is the most authoritative in the United States, and it is also the industry standard for electronic products in the United States, and it has been approved by the US federal agency to perform tests, so rest assured to buy

Features of carbon monoxide alarm:
1: Easy to install, very simple
2: The backlight display of the display screen, when the danger comes, you can immediately see the degree of co on the display screen, and make a better judgment
3: Test/Reset button
4: Low battery indication
5: Power saving function
Information About Carbon monoxide Detector
Power Supply: 3* AA Size 1.5V batteries(Battery not Included)
Sensor type: Electrochemical CO sensor
Standby Current: Alarm Current: Alarm tone: 85 decibels
Operation Ambient Condition: 5~400C,25~85%R.H
Detecting level range: 000-999PPM
Error: +/-10%
Size:3.937（inch）*3.937（inch）*1.377（inch）
Weight:80g
Package Include:
1 x Carbon Monoxide Alarm
2 x Screws，2 x Nuts
1 x User Manual
Notes:

1. The carbon monoxide alarm is designed to detect carbon monoxide gas. Not suitable for smoke detection or any other gas detection.
2. Before installing the carbon monoxide detector, peel off the back cover of the carbon monoxide alarm product, and then put the battery into the carbon monoxide detector. (battery not included)