1、【Multi-function Detection & High-precise Electrochemical Sensing】: VT-CHO2 is a multi-function detector that can detect five parameters of formaldehyde, TVOC, carbon dioxide, temperature, and humidity at the same time to meet a variety of testing needs. Support Fahrenheit/Celsius switching. Adopt high-precise electrochemical sensors to ensure accurate and reliable data. 2、【Full-color LCD Display】: The device adopts a full-color LCD display, clearly displaying various testing data. With its user-friendly interface, the information is clear at a glance, ensuring air quality is under your control. 3、【Intelligent Alarm System】: With real voice reminder function. It is designed with a buzzer, voice alarm, and mute mode. If the data exceeding the threshold is detected, the alarm is immediately activated, while the screen displays the level of air quality to ensure user safety. 4、【1000mAh Battery & Low Power Consumption Standby】: Equipped with 1000mAh high capacity lithium battery, low power consumption design, ultra-long working time. Energy-saving mode can continue to work for about 20 days to meet the long-term detection needs. 5、【Portable and Humanized Design】: A bracket is designed on the back of the product and carried with a lanyard for easy carrying and placement. It can be smoothly placed on any flat surface, adapting to diversified use scenarios. 6、【Wide Applications】: Suitable for air quality, temperature, and humidity testing in offices, homes, camping tents, fireplaces, automobiles, factories, places of business, and other environments.