1Compact, lightweight, and handheld design, more reliable, practical, and convenient to detect formaldehyde. 2With high sensitivity, can give you the accurate and effective data to take some actions 3Four-digit LCD display and non-slip design, not only help you read the data clearly, but also convenient for you to grasp. 4Simple and easy to carry and operate, and has a wide range of application. 5Widely used for detection of aldehydes in home furniture, gardening, dyes, paper, medicine, food, anti-corrosion, crafts, farms, garbage disposal plants, perm places, living places,etc.