Feature: 1. TVOC Sensor: This air quality tester adopts the semiconductor TVOC sensor to convert the carbon dioxide concentration, with stable performance, low consumption and long service life. 2. Digital Display: The screen of the tester displays electricity, CO2, temperature and humidity, and accurately detects CO2. 3. Excellent Performance: This tester features good selectivity, not susceptible to toxic aging caused by harmful gases, quick response speed and good stability. 4. Easy Carrying: Comes with small size and lightweight, you can easily take this tester with you to help with your work. 5. Plastic Material: Made of premium plastic material, this tester is light in weight and scratch, impact resistant, ensuring a long life span. Specification: Item Type: Formaldehyde Detector Material: Plastic . Package List: 1 x Formaldehyde Detector 1 x Data Cable