• This detector is design to detect the concentration of
  flammable gas (natural gas [Methane], propane, butane,
  liquefied petroleum gas, liquefied natural gas).
• It's a helpful appliance for home, room and factory detection.
• The concentration of CO will be indicated
  by LED and buzzer voice.
• Battery supply: AAA x 2.
• Indication Level: 500 ppm, 2000 ppm.                       
• Sensor Lifetime: 5 Years.
• Working Temperature: 0-50°C (32-122°F).         
• Working Humidity: < 90% RH.
• Storage Temperature: -20-60°C (-4-140°F).
• Storage Humidity: < 95% RH.

• This detector is design to detect the concentration of
  flammable gas (natural gas [Methane], propane, butane,
  liquefied petroleum gas, liquefied natural gas).
• It's a helpful appliance for home, room and factory detection.
• The concentration of CO will be indicated
  by LED and buzzer voice.
• Battery supply: AAA x 2.
• Indication Level: 500 ppm, 2000 ppm.                       
• Sensor Lifetime: 5 Years.
• Working Temperature: 0-50°C (32-122°F).         
• Working Humidity: < 90% RH.
• Storage Temperature: -20-60°C (-4-140°F).
• Storage Humidity: < 95% RH.