5 In 1 Quality Monitor Indoor Detector HCHO TVOC Tester With Temperature And Humidity Sensor Rechargeable LED Display Quality Features: Five in one monitoring: This quality monitor detects carbon dioxide, , and other pollutants in real time TVOC、 Temperature and humidity ensure that everyone has to clean and Clear LED display screen with alarm function: 9-inch high definition LED screen provides clear and visible data. The carbon dioxide monitor flashes light of different colors according to the concentration , and emits an alarm when the concentration reaches 1500ppm or above Improving circulation: The detector adopts a multi with openings all four sides, which can achieve better circulation and more accurate measurements. This can overheating and extend the lifespan of the monitor One click convenience: With one click , it is easy to turn or off the tester and observe various data. Built in 4-color LED lights can easily indicate the of quality, making it easy to identify or unhealthy conditions Long lasting rechargeable battery: This portable monitoring device is equipped with a 1200mAh rechargeable lithium- battery, which can be carried around and continuously monitored with a charge. Comes with a 5V USB cable for easy charging Product Description: Five in one monitoring