About This 【7-in-1 Air Oxygen Monitor】This 7-in-1 multi-functional oxygen detector can detect multiple parameters in real time: CO (0-500PPM), CO2 (400-5000PPM), O2 (0-30%VOL), temperature (32℉-140℉), and humidity (0-95%RH). The rechargeable oxygen monitor also features a flashlight, SD card data storage, and a convenient lanyard, making it not only suitable for indoor air quality monitoring but also an ideal travel companion. 【High-Precision Sensors】The O2 monitoring system uses a high-sensitivity DDS sensor imported from the UK, boasting excellent stability and rapid response. The CO monitoring system is equipped with a professional electrochemical sensor, exhibiting extremely high selectivity for CO and capable of sensitively detecting low-concentration leaks. The CO2 monitoring system features an NDIR infrared sensor, offering strong anti-interference capabilities and ensuring long-term stable CO2 measurements. 【Dual Audible & Visual Alarm】The oxygen detector is equipped with a 3.27" HD color LCD screen. When any indicator reaches the alarm threshold, the corresponding value on the screen will immediately flash prominently, accompanied by a loud alarm sound. When the alarm sounds, you can choose to temporarily mute it for 5 minutes; if the risk persists, the alarm sound will automatically resume. Alternatively, you can choose to permanently disable the alarm sound, leaving only the visual flashing. 【2500mAh Large Battery】This oxygen monitor features a built-in 2500mAh rechargeable lithium battery, coupled with an automatic sleep mode (the screen automatically turns off after 1 minute of inactivity), effectively extending usage time. The inclusion of a universal Type-C interface makes charging more convenient and efficient. Even when charging in sleep mode, the screen backlight remains on, allowing the device to continue operating normally and enabling real-time monitoring while charging. 【Calibration Mode】Upon power-on, the oxygen monitor will automatically enter a 1-minute countdown warm-up phase. For oxygen levels, the oxygen detector provides dual automatic calibration values of 20.9% and 0%. Manual calibration is available for carbon dioxide, temperature, and humidity. For safety reasons, carbon monoxide calibration is prohibited.
