COM - 3200 proii upgrade the precision of the negative ion of anion tester in the COM - 3200 pro tester based on the built-in charging time is extended to about 8 hours of continuous use, at the same time absorbing the size, shape is used in the forestry bureau, gardens, scenic spots, forest, waterfalls, such as environment measurement, equipped with a dedicated computer analysis software, can record analysis data such as number of negative ions, temperature, humidity, time, matching WY - 100 - g (GPRS) wireless collector can easily use remote wireless transmission and can according to need to increase the PM2.5, wind speed, intensity of illumination of meteorological parameters, such as monitoring, Suitable for researching and publishing data.