Features:brand new and high qualityHandheld size in, lightweight and easy to hold, you can put the air quality monitor inside your pocket or backpack then carry it with you anywhere, widely used in home, car, hotel, apartment, office, outdoors and indoors.The energy saving design to allow a longer testing for time and standby for time, and the large LCD display allows you see clearly even in the darkness, easy to use.HCHO measurement ranges 0.000 - 2.888mg or m while TVOC measurement ranges 0.000 - 9.999mg or m.This new air quality monitor adopts latest high quality sensor to high accurately test the data of HCHO and TVOC (0.001 accuracy), this professional air quality meter helps to quickly and accurately detects harmful gas in your home.Made of high quality ABS housing material, durable and long for time service. Specifications:Material: ABSSize: 133x43x24mm or 5.24x1.69x0.94 in Note:Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1x Formaldehyde Detector