The 5-in-1 air quality monitor has built-in professional laser particle sensor, which can accurately detect the current indoor PM2.5, PM1.0, PM10, temperature and humidity in the air. The mini air quality monitor is small and , which is easy to carry. You can check the indoor and outdoor air quality anytime, anywhere to monitor the air quality. The PM2.5 particle sensor is more accurate than the infrared sensor. Built-in fan increases gas fluidity and increases detection range and sensitivity. The mini air quality meter has a built-in 1000mAh capacity rechargeable battery, which can last about 20 hours on standby when fully . This PM2.5 monitor only requires 3 buttons to operate. It built-in 4 Color LED lights that display air quality levels conveniently. When the reading reaches 36ug/m, an alarm will sound. It is widely used in indoor and outdoor settings and can effectively prevent harm to the body from PM. Colour:black Material:ABS 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.