Description/Features: 1. - air detector monitors air conditions in real time, performs a "physical examination" for the air around you, cares for the health of your family, and lights up your life with technology 2. Focus and manual screen-off function; humanized design creates a comfortable test environment without interference at night, single-item display focuses 3. Cold, warm, dry, wet, temperature and humidity full detection, understand the air and breathe healthily closer 4. Applicable to multiple scenes for real-time detection of home, study, yoga room, classroom, office and other environmental conditions Specifications: Model: MT03 Detection: CO2 Temperature Humidity Other functions: Calibration function Screen off function Temperature/Fahrenheit switch Sound Power supply: 1200mah rechargeable battery Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color: Black Material: plastic Package Contents: 1 x Air Quality Monitor Only the above package content, other products are not included. 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.