Features: 1. Made of high quality ABS housing material, durable in use. 2. You can use this detector to detect indoor formaldehyde and TVOC. 3. LED display screen, you can read the digits and data clearly. 4. Lightweight and portable size, easy to carry and convenient to use. 5. Suitable for using in office, living room, bedroom and cars. 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/M³ Detection Range: Formaldehyde: (0.001-1.999Mg/M³) TVOC: (0.001-9.999Mg/M³) 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.