Useful air quality detector with quick response and high precision to test oxygen content in air that surrounds you and real-time display time date temperature and relative humidity. Features: 3.5-inch TFT Color Display: real-time display current time date oxygen temperature and relative humidity. screen has wide viewing angle that can reach 160° which is very easy to read. Data Logging Function: with up to 65 534 groups maximum storage management space convenient for browsing historical data saved by system. Semiconductor Sensing Detection Technology: air quality in your surrounding with highly accuracy real-time detect O2 temperature and humidity. Simple Stylish Appearance: air quality has small size and design perfect fit for house with any decorative style. Free-standing style no mounting required. Wide Applications: suitable for using in car bedroom living room office classroom library etc. Specifications: Display: 3.5-inch TFT Color Display Data Storage: 65534 groups : Built in 3.7V 3000mAh battery Input: 5V/1A Temperature Test : -9~55℃ Humidity Test : 0~ O2 Test : 0~30% Working Environment: -9~55℃ <90%RH Material: ABS Item Size: 10 * 7.8 * 5.6 cm / 3.94 * 3.07 * 2.2 inch Item Weight: 196g / 6.91oz Package Size: 17.8 * 11.2 * 6.9 cm / 7.01 * 4.41 * 2.72 inch Package Weight: 376g / 13.26oz Package List: 1 * Air Quality Detector 1 * USB Charging Cable 1 * User Manual (English)