Carbon Monoxide Gas Detection, LittleBee Digital LCD Display Monoxide Alarm Detector, Battery Powered, Electronic Equipm

Alarm warning when the carbon monoxide at a dangerous level, the red LED light will fast flashing, and alarm with a 85 dB sound
ALARM STANDARD: 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes.
Portable and easy to installation: This alarm must be mounted on a wall, you can mount it on wall with screws inside.
LCD display: With 3 digits LCD Displayer is Optional,