LCD display ceiling mounted Carbon Monoxide gas alarm gas Detector

Description

LCD�displayer�with�a�blue�back�ground�light.
-Loud�*5�decibel�alarm.
-Permanent�carbon�monoxide�sensor.
-Powered�by�3�X�1.5V�AA�batteries.
-the�alarm�sound�pattern�is�four�short�alarm�beeps�.The�red�LED�will�flash�while�in�alarm�mode.
-One��chirp��every�*0�seconds�is�an�indication�that�the�battery�is�low�(need�replacement)�(green�LED�still�flashes�once�every�*0�seconds)�or�the�unit�is�malfunctioning�(green�LED�is�out.).�
-Alarm�memory�feature:�if�the�unit�ever�alarms,�pressing�the�button,�green�LED�will�flashes�once�every�second�for�one�minutes�and�the�peak�alarm�level�will�indicate�on�the�LCD.
-Test/Reset�button�to�test�the�unit�electronics�and�verifies�proper�unit�operational�and�reset�the�unit�during�CO�alarm.��
-Green�and�red�LED�lights�that�indicate�normal�operation�and�alarm�status.
*3�digits�LCD�displayer�is�optional.��Err��on�the�LCD�to�indicate�the�unit�is�malfunctioning.��Lb��on�the�LCD�to�indicate�it�low�battery�and�need�replacement.��**9ppm��on�the�LCD�to�indicate�CO�level�over�**9ppm.�If�the�Co�leakage�is�less�than�**9ppm�but�over�*0ppm,�it�would�show�its�actual�concentration.
�Blue�back�light�will�be�lighted�when�pressing�the�test�botton�or�alarming.
-The�unit�will�sound��chirp��and�red�led�flashes�once�as�power�up.
-Power�saving�feature:�The�alarm�sound�pattern�is�4�beeps�every�5seconds�for�the�first�4�minutes.�In�4�minutes,�it�will�change�to�4�beeps�every�minute�to�save�the�battery.
�
ower�supply:3�AA�size�1.5V�batteries
Sensitivity�?�time:�*0ppm,�alarms�within�****0�minutes
�������������������**0ppm,�alarms�within�****0�minutes
�����������������**0ppm,�alarms�within�3�minutes
Standby�Current:�
Operation�Ambient�Condition:***0?,****0%R.H.
�