A standard 418Mhz MKIII (non-LR models) take two second readings and then the station sends 15 records to the display at a time (once every 30 seconds) you still get two second readings but what you see on the display was what it was 30 seconds ago. With the LR model, what you see is what it was two seconds ago. The IP100 will log two second information internally but uploads to RainWise.net every minute and if chosen to WU every 3 seconds.