To view the data logs you need the Sniper software on your desktop or laptop PC. You can download the Sniper software from the support area in the Holley website. You record the data log on the Sniper by pushing the data log button. Then pop the SD card out of the hand held and put it in your computer. You need to know how to open up the SD card in your file manager and find the data logs but that is about the only trick.