1,Conforms to EN50291 2,NEMOTO/FIGARO/SIXTH SENSE sensor 3,Product life:10 years 4,Low battery signal 5,Sound:>85DB at1M Co alarm Power Supply: DC 9V battery operated,Lithium batterySensitivity Setting: conforms to EN50291Standby Current: <10μAAlarm Current: <30mAOperation Ambient Condition: 4~38, 25~85%RHSensor Type: electrochemicalSensor life: >5 YearsDisplay range: 20-999PPMHush functionLow ...