Package includes: 1 piece of O3 Ozone Gas Detector The product will be upgraded constantly, the appearance and color may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Product Specifications: Test content: O3+AQI+Temperature+Humidity Electrochemical sensor TFT LCD screen display -320*240 pixels It can be used in office, indoor outdoor and detection of ozone residue after disinfection. 24 hours real time monitoring Power supply:Built in Li-battery 2000mAh Material : ABS with TFT Screen Color: Black&Orange Size : 164*74*26MM Detection data range:O3(0.000-5.000ppm) Product Description: Electrochemistry sensor for O3. Temperature and Humidity sensor. AQI for ozone concentration index. Support time and date, self-calibration function. O3 concentration AQI: 0 ~ 0.100 -- -- -- -- -- Good 0.100 ~ 0.300 -- -- -- -- -- Slight 0.300 ~ 1.000 -- -- -- -- -- Monderate 1.000 ~ 4.999 -- - Serious Operating: 1)Power on / off button, used to confirm highlighted options or to turn device on/off by pressing for 3 seconds. 2)Menu Button,used to call up the dialog box for adjusting various parameters. 3)Exit / ESC button, used to exit from menus 4)Up / Switch /Increase Button, used to scroll between interfaces or navigate within menus 5)Down / Switch / Decrease Button, used to scrollbetween interfaces or navigate within menus 6)LCD screen, display various parameters. 7)USB Charging Port