BAZHOU Air Quality Detector 5 in 1 Real Time Data Multifunctional Indoor Formaldehyde Tester Industrial instruments DISPLAY: design with LED screen digital display; the air quality tester can offer mean value for each air USAGE: this air quality tester is designed to get an overview of the air quality in a home, workplace, school, a daycare centre or any other location PORTABLE: the air quality tester makes it easy to take measurements everywhere, ensures the health of family members or employees POWER SUPPLY: air quality detector Built with 1000 mAh rechargeable battery and packaged with one USB cable, the standby time can last for 3-4 hours PRACTICAL: Just press the power on / off button, you can easily operate this air tester, real-time detection of harmful HCHO and TVOC color: White Size: 125*80*35mm Quantity: 1pc 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding. 3. Only the above package contents, excluding other products.