* 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): 3 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

* Malfunction 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