1.conform to EN50291 2.NEMOTO/FIGARO/SIXTH SENSE co sensor 3.9V battery with LCD display(20~999ppm) 4.alarm sound:>85DB at 1M

CO alarm  GS808 with LCD display range

NEMOTO / FIGARO / SIXTH SENSE  co sensor

Power Supply: DC 9V battery operated

Sensitivity Setting: conforms to EN50291

Standby Current: <80μA

Alarm Current: <30mA

Operation Ambient Condition: 4~38°C, 25~85%RH

Sensor Type: electrochemical

Sensor life: >5 Years

Display range: 20-999PPM

Hush function

Low battery voltage alarm

Recommended battery: Gold peak 1604A, Gold power G6F22

Alarm sound: ≥85DB at 100cm at 3.4±0.5KHz pulsing alarm (The alarm

pattern is 4 short beeps-followed by 5 seconds of silence-followed by 4

short beeps with a corresponding LED flash ,repeat this alarm pattern)