Feature: 1. Using laser scattering principle for precise measurement, the minimum resolution is 0.3μm, 0.3μm, 0.5μm, 1.0μm, 2.5μm, 5.0μm, 10μm particle quantity output, and the service life is up to 3 years. 2. Temperature, humidity, carbon dioxide, formaldehyde, haze detection, and battery are all optional. You can choose flexibly according to your own usage. The suitable configuration is a good choice. 3. The font color changes with the data, the super‑large font is clear at a glance, very intimate. Easy to use. No need to calibrate, no need to warm up, test at boot. The detection is more accurate and the system is smoother. 4. Using for ARM chips, 90% of the world's smartphone processors are produced by for ARM with 32‑bit high‑speed processing performance, which is 10 times faster than the 8‑bit computing speed of similar products. 5. The color and appearance are also super delicate. With wide range of applications, can be used for G5 car and home. Air quality levels indicator: good, moderate, poor, unhealthy, severe and hazardous, showing you instantly what your air quality is like Specification: Item Type: PM2.5 Detector.Material: PCBSize: Approx. 8.3 x 6.5 x 3.3cm / 3.3 x 2.6 x 1.3in1. Using for ARM chips, 90% of the world's smartphone processors are produced by for ARM with 32-bit high-speed processing performance, which is 10 times faster than the 8-bit computing speed of similar products. The detection is more accurate and the system is smoother.2. Using laser scattering principle to accurately measure, the minimum resolution is 0.3μm, 0.3μm, 0.5μm, 1.0μm, 2.5μm, 5.0μm, 10μm particle quantity output, and the service life is up to 3 years.No need to calibrate, no need to warm up, test at boot Package List: 1 x Detector1 x Power Cable1 x English User Manual