LCD CO Carbon Monoxide Alarm Sensor

Features:
*LED display with blue back ground light,easy to read.
*Loud alarm sound,the alarm volume reach 85dB.
*Power saving feature:the alarm sound pattern is 4 beeps every 5 seconds for the first 4 minutes. 4 minutes later,it will change to 4 beeps every minutes to save the battery power.
*High reliability sensor design, effectively detect the real-time CO gas and remind people.
*The alarm sound pattern is four short alarm beeps,the red LED will flash while in alarm mode.
*Onechirpevery 30 seconds is an indication that the battery is low and need to be replaced.
*Test/Reset button to test the unit electronics and verifies proper unit operation and reset the unit during CO alarm.
*Green and red LED lights that indicate normal operation and alarm status.
*3 digits LCD display is optional. Errindicate the unit is malfunctioning; Lbindicate it low battery; 999ppmindicate CO level over 999ppm.
*Compact, lightweight easy to operate.