Features:<br>3.5-inch TFT HD Color Display: real-time display current time, date, oxygen, temperature and relative humidity. The screen has wide viewing angle that can reach 160, which is very easy to read.<br>Data Logging Function: with up to 65,534 groups maximum storage management space, convenient for browsing the historical data saved by the system.<br>Semiconductor Sensing Detection Technology: monitoring air quality in your surrounding with highly accuracy, real-time detect O2, temperature and humidity.<br>Simple Stylish Appearance: the air quality monitor has small size and clean design, for house with any decorative style. style, no mounting required.<br><br>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!<br>Wide Applications: suitable for using in the car, bedroom, living room, office, classroom, library, etc.<br>Specifications:<br>Display: 3.5-inch TFT HD Color Display<br>Data Storage: 65534 groups<br>Power: 3000mAh lithium battery<br>Temperature Test Range: -9~55<br>Humidity Test Range: 0~100%<br>O2 Test Range: 0~30%<br>Working Environment: -9~55 Less than 90%RH<br>Color: As shown<br>Material: ABS<br><br>Package Contents:<br>1 x O2 Detector<br><br>Only the above package content, other products are not included.<br>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.