Features: *Brand new and high quality *Made of high quality material, strong and durable *13 in 1: time, date, alarm clock, timer, stopwatch timer PM2.5PM1.0PM10 CO2TVOC formaldehyde HCHO temperature, humidity *12.8-inch color TFT display screen, Tuya Smart APP, real-time data monitoring and historical data viewing *Every time you connect to the Tuya Smart APP, the time and date will be automatically updated synchronously with the mobile phone. *Tuya APP WIFI connection *Within 2 minutes after starting up, the WIFI symbol keeps flashing fast, indicating that it is in the process of pairing and connection. At this time, open the Tuya APP to add devices, and then you can connect to this device *Or press the button 5 times in a row, the WIFI symbol will flash continuously, and the current binding will be released and re-enter the pairing mode. *The WIFI symbol flashes slowly to indicate that there is no connection and pairing, and the WIFI symbol does not flash to indicate that the connection and pairing is successful *Press the button for 3 seconds to automatically power on *Automatically counts for 60 seconds after power on. *PM2.5 data greater than 100 will alarm, 4beeps *When the CO data is greater than 50, it will give an alarm with one sound; if it is greater than 100, it will sound with 2 alarms; *Press the button twice in a row to turn off the alarm sound. *Press once to switch between Fahrenheit and Celsius Operate: *Vertical screen time display: *1 Above the picture are: year, month, day, week, *2. The middle of the picture is: 12-hour time, chain After connecting to the Tuya APP, it will automatically synchronize with the mobile phone *3. There are 2 alarm clock times at the bottom of the picture, you can set the alarm clock time on the Tuya APP (12-hour format) *Vertical screen stopwatch display: *1. When the vertical screen is displayed, press the button 3 times continuously to enter the stopwatch timing display mode, *2. 000 in the upper right of the middle, the countdown timer, the unit is minutes, and the timing can be set on the Tuya APP. Press the button once to start the countdown, and when the set time is reached, it will automatically alarm for 30 seconds, or press the button twice in the middle to cancel the alarm. Press once to pause the countdown, and press twice in a row to cancel the countdown. *3. If the countdown time is not set, press the button once, the forward timer will start, press the button once to pause the timing, press the button twice to cancel the timing, *4. Press the button 3 times continuously to exit the stopwatch timing mode and return to the vertical screen time display mode Specification: *CO2 detection range; 400-6000PPM, ±50±15%PPM *CO2 detection sensitivity: 1PPM *TVOC detection range: 0-2.0 mg/m3 *HCHO detection range: 0-0.6 mg/m3 *PM2.5 detection range: 0-1000 ug/m3, *PM2.5 detection sensitivity: 1 ug/m3 *PM1.0 detection range: 0-1000 ug/m3 *PM10 detection range: 0-1000 ug/m3 *Temperature measurement range: -10~50 ℃ *Temperature measurement accuracy: ±2℃ *Humidity measurement range: 0%~99%RH *Humidity measurement accuracy: ±3%RH *Charging method: DC5V 1A TYPE-C USB interface *Battery Built-in lithium battery: 2000mAh *Working current: 260mA *Working voltage: 3.7V *Net weight: 160g *Color: white, black (optional) Package Included: 1X 13 in 1 Air Quality Monitor Notes: 1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. 2. Please allow a slight deviation between the data and the manual measurement. Brand new and high quality Made of high quality material, strong and durable 13 in 1: time, date, alarm clock, timer, stopwatch timer PM2.5PM1.0PM10 CO2TVOC formaldehyde HCHO temperature, humidity 12.8-inch color TFT display screen, Tuya Smart APP, real-time data monitoring and historical data viewing Every time you connect to the Tuya Smart APP, the time and date will be automatically updated synchronously with the mobile phone.