3*1.5V AA battery 85dB LCD carbon monoxide alarm

1) Power Supply: 3*1.5V AA batteries2) Sensor: Electrochemical CO sensor3)Alarm Style: Per EN502914) Sensitivity/Alarm Time: Within 60~90 minutes @ 50ppm CO concentration; Within 10~40 minutes @ 100ppm CO concentration; Within 3 minutes @ 300ppm CO concentration5) LCD Displayer(optiona

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