Built for everyday indoor air safety — this portable monitor uses electrochemical sensors to measure Formaldehyde (HCHO), Volatile Organic Compounds (TVOC) and Particle Matter (PM2.5). It gives clear, continuous readings, alerts you when levels become unsafe, and stores longterm mean values so you can track trends and take action. Key benefits Detects multiple hazards: simultaneous measurement of HCHO, TVOC and PM2.5 so you know what type of pollutant is present. Reliable sensing technology: builtin electrochemical sensors provide stable, accurate readings for common indoor pollutants. Immediate alerts: an audible alarm notifies you when air quality exceeds safe levels so you can respond quickly. Easy to read and operate: 4.3inch color LCD (320 x 240 pixels) shows current and longterm mean values; a single function button makes operation straightforward. Portable and rechargeable: compact size (about 14.5 × 7.8 × 9.72 cm) and a 1000 mAh rechargeable battery for convenient use anywhere. How it solves problems Identifies hidden risks such as formaldehyde from furniture, TVOCs from cleaning products or paints, and fine particles from cooking or nearby traffic. Tracks longterm averages to reveal patterns rather than oneoff spikes, helping you pinpoint sources and evaluate improvements. Lets you act immediately with a visible display and alarm rather than guessing about indoor air quality. Practical use scenarios home or renovation: place the monitor in living areas to detect formaldehyde and VOCs after installing furniture, flooring or paint; use the longterm averages to decide when it's safe to occupy rooms. Family living spaces: run the monitor in the bedroom or nursery to guard babies, children and pregnant women from elevated PM2.5 and VOC exposure; the alarm alerts you to take ventilation or aircleaning measures. Travel and vehicles: carry it to hotels or use in a car to check air quality quickly before extended stay or transport. Key specifications Sensors: electrochemical sensors for HCHO, TVOC; particle sensor for PM2.5 Display: 4.3inch color LCD, 320 × 240 pixels; shows current and longterm mean values Controls: single functional button; audible alarm for unsafe readings Power: 1000 mAh rechargeable battery Size: approximately 14.5 × 7.8 × 9.72 cm Portable: designed for household, kitchen, bedroom, office, school, car, hotel, travel, camping and party use This monitor delivers clear measurements, simple operation and onthespot alerts to help you improve indoor air quality and protect vulnerable family members.