Practical and professional air quality detector for detecting PM2.5 and Temperature Rh Humidity which can effectively monitor indoor air quality. It also can measure indoor temperature and humidity. The signal light will indicate the PM2.5 levels in Green, Yellow, Red colors for "GOOD", "FAIR", "BAD" conditions.<br> <br> <strong>Features:</strong><br> Indicate PM2.5 pollution level and humiture value.<br> Perfect air quality detector for monitoring indoor air quality.<br> Also can measure the current temperature and humidity.<br> Large &amp; clear LCD display with bright backlight and ℃/℉ switch, convenient to use.<br> Suitable for house, shopping mall, bus station and other indoor places.<br> The alarm will be triggered if the value is over 75 ug/m³.<br> Low battery indication and battery power indication.<br> <br> <strong>Specifications:</strong><br> Brand Name: SMART SENSOR     <br> Color: White<br> Material: ABS Plastic<br> PM2.5 Measurement Range: 0～999ug/m³<br> PM2.5 Resolution: 1μg/m³<br> Accuracy: ±5%   <br> Temperature Measurement Range: 0℃～45℃<br> Humidity Measurement Range: 0%～99%<br> Sensor Principle: Laser Scattering  <br> Display Mode: Large Screen LCD  <br> Alarm: Sound, Light Double Alarm<br> PM2.5 Signal Light: Green light for GOOD condition, Yellow light for FAIR condition, Red light for BAD condition.<br> The backlight will switch off automatically after 15 seconds.<br> Battery: 3.7V 1000mAh Lithium Battery (Included)<br> Power Adapter: AC 100-240V 50/60Hz <br> Output: 5V DC 1A<br> Operating Temperature: 0～45℃, 0%～99%RH<br> Item Size: Approx. 70 * 70 * 140mm / 2.75 * 2.75 * 5.51in (L * W * H)<br> Item Weight: Approx. 188g / 6.64oz<br> Package Size: Approx. 25.5 * 21 * 6cm / 10.04 * 8.27 * 2.36in (L * W * H)<br> Package Weight: Approx. 672g / 23.70oz<br> <br> <strong>Package List:</strong><br> 1 * Air Quality Detector<br> 1 * Power Adapter<br> 1 * USB Cable<br> 1 * Wall Hanger <br> 1 * Base<br> 1 * User Manual<br> 1 * Storage Case