Battery operated carbon monoxide alarm

Response time:
50 ppm    60-90 minutes
100ppm    10-40 minutes
≥300ppm within 3 minutes  
Power source:3pcs 1.5V AA battery.
Standby mode:<80uA
Working mode:0.4~1.5mA
Alarming mode:50~65mA
Alarm decibel:≥85db/1m 
Push to Test
Low battery signal
Pending for EN 50291 and UL approval