Tuya APP Remotes Viewing:After connect with your mobpilephone APP correctly, you can view the data on your mobilephone easily, wherever you are. Built-in battery:Built-in large capacity rechargable lithium battery to supplys power, and you can recharge it in time. Large Display:Large color screen allows you to browse the data more clearly, makes it more convenient for elderly and children, giving you a better experience. Wide Applications:This detector is suitable for indoor air quality detecting, and can be widely used in your home, living room, bedroom, office and other places. Intelligent Linkage:You can achieve intelligent linkage through Tuya APP. After setting, you can acchieve the intelligent linkage such as when the temperature up to 34 , automatically open the door. Parameters Device name: Multifunctional air quality detector Device model: Instrument type PM2.5 (fog dance particles) range: 0-999ug/m3 C02 (carbon dioxide) range: 400-5000ppm TVOC (odor gas) range: 0-3.000mg/m3 HCHO (formaldehyde) range: 0-2.000mg/m3 TEMP (temperature) range: 0-50/32-122F (Fahrenheit) HUMI (humidity) range: 0-99RH Battery: 3.7V 1200MAH lithium battery Charging port: USB charging port Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:B: Black Material:plastic Package Contents: 1*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.