[ Multifunctional CO detector] Our portable carbon monoxide detectors are not only capable of detecting CO levels, but also temperature and humidity, and data is displayed on a colorful screen clearly. With a ELECTROCHEMICAL sensor, quickly determine the surrounding CO value and overall air quality, real-time knowing the environment is safe or not. [Portable CO detectors] Our mini CO detectors are designed to be portable and convenient. they are compact and easy to carry. [Built-in 400 mAh battery] CO detectors support type-c fast charging [More Accuracy CO detectors] detecting Carbon monoxide / Temperature / Humidity. [Widely use compact and portable CO detectors] With compact and portable design, our carbon monoxide detectors is perfect use for outdoor and indoor occasions. use it in bedroom, living room, kitchen or cellar. And also, it is a perfect tool for detect air safe when traveling, Hotel trip, in car, RV travel, camping, picnic, business trip, or indoor barbecue. CO