China alarm security infrared smoke detector, gas leak detectors MD-808LCD

Features:

-LCD dispalyer with a blue back ground light.

-Lound 85 decibel alarm.

-Permanent carbon monoxide sensor.

-Power 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 30 seconds is an indication that the battery is low(need replacement)(green LED still flashes once every 30 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 uit 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. "999ppm."on the LCD to indicate CO level over 999ppm. If the Co leakage is less than 999ppm but over 30ppm, 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 powwer 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.