[Latest version] The latest advanced version is a compact and high -precision car monoxide checker alarm for camping. You can search for ventilation and cause in a safe environment, a more accurate measurement that can be more accurate with a higher performance sensor than a commercially available detector. Operation temperature: 5-45 ℃ Outdoor use is used. Please note that the sauner tent is not available. [Safe and effective checkers] LCD backlights are excellent in visibility even in dark places, displaying the concentration in the air digitally, and when dangerous levels are detected, the red LED flashes and the alarm up to 85 dB. It sounds, but the volume increases, but does not damage your ears.. [Wiring unnecessary & easy installation] 3 x 1.5V AA operating (sold separately), when the battery electricity is low, the audio sounds (LB) on the LCD.. Battery -driven units do not require any cables and wiring, and can be used quickly and easily without the need for an electric engineer. [Safe in the winter season] Informed of incomplete combustion by sound to prevent accidents! Please use it in the outdoor scene such as camping where oil, kerosene, gas, firewood, charcoal, etc. (oil stoves, wood stoves, gas stoves, charcoal grills, etc.) are installed.. * In order to reduce the shipping fee, we will ship without a box. * According to the English instruction manual

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