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

* Sensor Life: 3 years

* Operation ambient: 0 ~ 40, 20% ~ 90%RH

* Mounting: Wall/Ceiling mounting

* Dimension 100mm*40mm, Weight: 0.2kg

* Comply With: CE, EN50291