Description/Features: appearance, more beautiful Electroplated lens close to full-screen, more high-end Standby for more than 15 hours when fully , more Screen - off mode can be turned on during idle rest, more energy-saving Specifications: Detection: PM2.5 HCHO TVOC 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: White Material: plastic Package Contents: 1 x Air quality detector 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.