Features: 
* Motorola IC control, Reliable without false alarming
* Field audio and visible alarming
* Simple installation
* Excellent reliability & high stability
* Self test function
* Durable sensor head
* Less affected by other organic solvent
* High Accuracy
* CE and EN50270 Standard

Engineering Specification:
* Power Supply: 3*1.5V AA batteries
* Sensor: Electrochemical CO sensor
* Alarm Style: Per EN50291
* Sensitivity/Alarm Time:
Within 60~90 minutes @ 50ppm CO concentration;
Within 10~40 minutes @ 100ppm CO concentration;
Within 3 minutes @ 300ppm CO concentration
* LCD Displayer (optional): 4 digits LCD displayer
* Audibility: 85dB ( at 1m distance ), Frequency 3±0.5KHZ
* Led Indication /Sound Pattern:
Standby: Green Led flashes once every 30 seconds
Alarm: Red Led quickly flashes 4 times with unit chirping every 5 seconds, then repeat,
* Low-bat Indicator:
Chirp every 30s as battery lower than 3.3V with green LED flashing and Lb on LCD
* Mal-function Indicator: Chirp every 30s with green LED out and Err on LCD
* Power consumption: 0.3mW
* Dimension 100mm*40mm, Weight: 0.2kg
* Comply With: CE, EN50291