Accurate Gas Detection: The Digital Air Quality Monitor is a reliable Gas Detector that measures formaldehyde (HCHO) and TVOC levels, you maintain a safe and healthy environment in your home or office. User Friendly Display: Featuring an LED digital display, this portable sensor tester provides clear readings of air quality, allowing you to monitor pollutants like formaldehyde and TVOC easily at a glance. Wide Testing Range: With a testing range of 0.000~2,888 mg/m³ for formaldehyde and 0.000-9.99 g/m³ for TVOC, this Gas Detector ensures precise measurement across various indoor settings, making it suitable for different applications. Compact and Portable Design: The lightweight and compact dimensions (133*43*24mm) of the Digital Air Quality Monitor make it easy to carry around, enabling you to test air quality wherever you go. Power Efficient: Operates on two AA 1.5V batteries (not included) with a working voltage of 1.5V~3.2V, this Gas Detector is designed to be energy-efficient, providing prolonged usage without frequent battery replacements., Manufacturer: HIJYMNZPQ