I am pretty sure those ranges for TVOC and eCO2 are from the datasheet used on the [SparkX version of the breakout and are just out of date. It looks like we received an updated datasheet from ams but did not update the specifications to match those listed in the datasheet. I will let our Catalog team know about the out-of-date specifications for this sensor and we will get the Features tab updated with the correct data.](https://www.sparkfun.com/products/retired/14181)