YIK TUNG Mini CO2 Meter High Accuracy CO2 Meter CO2 Manager with Alarm Function Portable Small Carbon Dioxide Concentration Meter with Metal Hook

---------------------------------------------------------------------- [Lightweight and convenient to carry] The main unit weighs approximately 0.15 kg and comes with a metal hook that can be hung on a key chain, allowing you to take measurements anytime, anywhere, indoors or outdoors. [Real-time monitoring] Data is refreshed every 2 seconds. 400-800PPM is green means safe. If it exceeds 1000PPM, a repeating alert will be displayed every 10 minutes. (Concentration measurement range: 400-5000PPM) [Standby Mode/Long Time Use] If there is no operation for 5 minutes, the monitor will automatically turn off and enter standby mode. This is to reduce power consumption. To use it again, press briefly to display the CO2 concentration and the screen display will last for 1 minute. 3.7V polymer lithium battery with a capacity of 900MAH, it only takes 2.5 hours to charge and the working time is 7 hours. [With alarm] When the measured value is greater than 1000, the carbon dioxide concentration meter will emit an alarm sound "Diddy...". If you don't turn it off, it will cycle and alert you once every 10 minutes. [Note] If you need a Japanese instruction manual, please contact us. If you have any questions, please feel free to contact us using the "Order Inquiries" section. Thank you for your support. This mini CO2 meter has a wide range of applications and can be used in homes, laboratories, offices, hotels, schools, factories, conference rooms, airports, hospitals, restaurants and many other public places.