Premium Material: Air quality monitor is made of high quality ABS housing material, durable in use.This indoor air quality monitor accurately assesses multiple measures of air quality including concentrations of formaldehyde (HCHO). LED Display: Formaldehyde detector with LED display screen, you can read the digits and data clearly. Formaldehyde & TVOC Detector: You can use this detector to detect indoor formaldehyde and TVOC. This easy-to-carry air quality tester can help monitor air quality at home, in the car, and in hotel rooms. Portable Size: This air quality monitor is lightweight and portable size, it is easy to carry and convenient to use. Wide Application: Air quality testing is suitable for using in office, living room, bedroom and cars.By measuring particulate pollution, an air pollution monitor can also help you know when asthma may worsen and when to change your homes air filter. Specification: Condition: 100% Brand New Item Type: Formaldehyde Detector Material: ABS Housing Model: DM-101B Testing Item: HCHO TVOC Screen: LED Display Power Supply: 2 * AA Batteries (Not Included) Concentration Unit: 0.001Mg/M Detection Range: Formaldehyde: (0.001-1.999Mg/M) TVOC: (0.001-9.999Mg/M) Working Voltage: 2.4V-3.0V Detect Temperature: -10~50 Storage Temperature: -10~45 Size: Approx. 14.3*6.5*2 cm / 5.6*2.6*0.8 inch Weight: Approx. 130g / 4.6 oz Package list: 1 * Formaldehyde Detector (Battery Not Included) Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.